Cox says he has been active in politics since 1980, when he campaigned with his parents for
Ronald Reagan. He also worked on the
1996 presidential campaign of
Alan Keyes and as an aide to former
U.S. Representative Roscoe Bartlett. Cox ran on a platform that included establishing a division to help fathers gain visitation, ensuring mothers received child support, and refusing to issue licenses for
same-sex marriages, which were not legal in Maryland at the time. During the Republican primary, Cox was described as being the most conservative candidate in the Republican primary race. In September 2016, Cox claimed that "far-left sign Nazis" were stealing campaign signs he posted alongside state highways, and posted on Twitter that he had urinated on the signs as a deterrent to prevent theft. Cox won the Republican primary with 44.4 percent of the vote. In the general election, he was defeated by Democratic nominee and state senator
Jamie Raskin with 34.2 percent of the vote.
Maryland House of Delegates , who declined to endorse Cox during the 2022 Maryland gubernatorial election. In February 2018, Cox announced that he would run for the Maryland House of Delegates in District 4. He ran on a platform that included
cutting regulations, increasing immigration enforcement, and supporting gun rights. He campaigned on a platform that included lowering taxes, expanding
Interstate 270, and supporting
charter schools. In November 2018,
electioneering complaints were filed against Cox after he recorded a video of himself within 100 feet of an
early voting center in
Thurmont, which is prohibited by Maryland election law. Cox was sworn into the Maryland House of Delegates on January 9, 2019. He was a member of the Judiciary Committee, serving on its family law and public safety subcommittees from 2019 to 2020 and its family and juvenile law and civil law and procedure subcommittees from 2021 to 2023. From 2018 to 2021, Cox served as the secretary of the
Frederick County Republican Central Committee.
Involvement in the January 6 United States Capitol attack In November 2020, Cox said that he was part of a Republican legal team observing the count of mail-in ballots in
Philadelphia during the
2020 United States presidential election. After
Donald Trump lost the 2020 presidential election, Cox has repeatedly endorsed Trump's false claims of a stolen election and called for a "forensic audit" of the 2020 election results, later calling for an audit of the 2020 elections in Maryland. Cox helped arrange for buses to take constituents to the
"Save America March" in Washington, D.C., on January 6, 2021; the rally preceded the
violent attack on the U.S. Capitol. During the rally, Cox sent a
tweet attacking Vice President
Mike Pence, writing "Pence is a traitor." After receiving backlash, Cox tweeted and retweeted false claims blaming
antifa for the attack on the Capitol, and expressed his support for
Enrique Tarrio, the leader of the
Proud Boys, an extremist group with nationalist, neofascist and self-proclaimed Western-chauvinist views. Cox later said in June 2022 that his Twitter post was "his way of expressing his disappointment and not a personal attack on the vice president." After his win in the Republican gubernatorial primary, Cox denied organizing buses for the rally. The Frederick County Democratic Central Committee began a letter-writing campaign calling for Cox to be expelled from the House of Delegates for his false claims. In the statement Cox said he had attended the rally, but was not involved in the storming of the Capitol. In February 2022, representatives from
Our Revolution and other progressive groups urged the
Maryland State Board of Elections to consider blocking Cox from the ballot for his participation in the Capitol attack, citing
Section 3 of the 14th Amendment to the
United States Constitution. In May 2022, a lawsuit was filed against Maryland Elections Administrator
Linda Lamone, seeking to remove Cox from the
2022 Republican primary ballot for his presence during the Capitol attack. Anne Arundel County
circuit court judge Mark W. Crooks dismissed the case on May 20, 2022.
2022 Maryland gubernatorial campaign with Lieutenant Governor
Boyd Rutherford in October 2021. In late June 2021, Cox filed paperwork to
run for governor in 2022, and formally announced his candidacy on July 4, 2021. He launched his campaign with a campaign rally in
Cambridge on August 6, 2021. He picked Gordana Schifanelli, an
Eastern Shore lawyer, as his running mate. On November 22, 2021, Cox received the endorsement of former president Donald Trump. Ahead of the primary election, Cox threatened lawsuits seeking to invalidate mail-in ballots. Some political observers said before the primary that Cox would have publicly doubted the results if he had lost to
Kelly Schulz. As polls showed Cox and Schulz running neck-and-neck in polls, the
Democratic Governors Association spent $1 million for a television advertisement promoting Cox, hoping he would win the nomination and be easier for Democrats to defeat in November. Cox denied receiving any support from the DGA, saying that he had "nothing to do with the ad purchase". Some observers, including strategist Jim Dornan, say that two factors—Trump's endorsement and the DGA ad blitz—allowed Cox to advance to the general election. Other observers, including former
Maryland lieutenant governor and
Republican National Committee chair
Michael Steele, say the ads had little impact on voters, highlighting that far-right politician and
neo-Confederate activist
Michael Peroutka had won the
Attorney General primary on the same ballot by an almost identical margin to Cox, even though the DGA did not run any ads on his behalf. Cox won the Republican primary on July 19, 2022, defeating Schulz with 52.0 percent of the vote. At his victory party, Cox took photos with and accepted a gift from a young man who introduced himself as a member of the
Maryland Proud Boys. The footage of this encounter, which was uploaded to Cox's
Vimeo account, was deleted after
The Washington Post contacted the Cox campaign, which responded with a statement denying an association with the young man. Following his primary win, Cox sought to distance himself from the January 6 insurrection and former president Donald Trump, removing references to his endorsement from his website and making adjustments to his biography and issues pages. He also deactivated his account on
Gab, a website that has been described as a social media haven for white supremacists and neo-Nazis and was used by the perpetrator of the
Pittsburgh synagogue shooting, on which he had more than 1,000 posts. Republican leaders expressed concern that Cox's primary victory would hurt their candidates downballot, with Senate minority leader
Bryan Simonaire refusing to endorse or campaign with Cox and House minority leader
Jason C. Buckel saying that Cox would need to moderate his views for the party to make gains. The Maryland Republican Party would end up losing two seats in the state Senate and three seats in the House of Delegates in the
2022 elections. Cox was defeated by
Democratic nominee
Wes Moore in the general election on November 8, 2022. He initially declined to concede after the election was called for Moore by various national news outlets, believing that there was still a path to victory, but called Moore the next day to concede the election. Following Cox's defeat, his running mate Gordana Schifanelli filed to run for Chair of the
Maryland Republican Party, seeking to succeed retiring chairman Dirk Haire, but was blocked from running because she filed an hour after the candidacy deadline. Schifanelli later said that Cox blamed her for their loss and that the running mates rarely spoke to each other during the campaign, with their relationship souring well before the general election. Cox disputed this claim, telling
The Washington Post, "I never blamed Ms. Schifanelli for our election loss. Her comments are false and sadly self-serving." Cox later endorsed Nicole Beus Harris, a political consultant and the wife of U.S. Representative
Andy Harris, as the next chair of the Maryland Republican Party. According to the
National Conference of State Legislatures, Maryland is the only state that restricts the processing of absentee ballots until after Election Day. In September 2022 court papers and a hearing, Cox argued that the board lacked the authority to begin tabulating ballots before election day. On September 23, 2022, a Montgomery County Circuit Court judge ruled in favor of the board, allowing it to begin counting mail-in ballots on October 1. Cox appealed to the
Appellate Court of Maryland, which denied his request to halt the counting of mail-in ballots. In October 7, 2022,
Maryland's highest court unanimously rejected a further appeal from Cox. In an opinion written by Chief Justice
Matthew J. Fader in March 2023, the court held that a section of the state's Election Law Article referenced in his lawsuit did not "violate the
separation of powers guaranteed in the
Maryland Constitution's Declaration of Rights". In February 2023, the
U.S. Supreme Court declined to hear Cox's challenge, letting the ruling stand without comment. Cox did not commit to accepting the results of the election with mail-in ballots being counted early. During a debate on October 12, Cox was non-committal when asked if he would accept the results of the election: "I have always accepted the election results that are fair and that are following the Constitution. At this point, it would be similar to saying that before a surgery takes place to decide whether or not the surgery went well". Ahead of the election, Cox called on his supporters to "monitor" the state's election drop boxes, alleging without evidence that the drop boxes were "regularly misused and stuffed with nefarious ballots".
Post-legislative career After being defeated in the 2022 Maryland gubernatorial election, Cox returned to private practice in
Frederick County, Maryland. In February 2023,
Pennsylvania state senator Doug Mastriano hired Cox as his chief of staff. Cox also started a podcast titled ''It's Your Freedom!'', with the first episode premiering on
Facebook on February 7. Cox resigned as Mastriano's chief of staff in November 2023. Also in February 2023,
Wicomico County executive Julie Giordano nominated Cox to serve as special counsel for the county. Cox was scheduled to join the county council meeting to discuss any questions and concerns councilmembers had about his nomination, but was not present during the session. The Wicomico County Council voted 6–1 to reject Cox's nomination. In April 2023, Cox was hired by Robert Krop, a local firearms business owner who alongside Frederick County Sheriff
Chuck Jenkins was charged by federal prosecutors with conspiracy and making false statements to acquire machine guns, to represent him in his federal trial. In June 2023, Judge
Stephanie A. Gallagher denied a motion to dismiss the charges against Krop, in which Cox alleged that the indictment was "politically motivated" and questioned the Ukrainian citizenship of the lead
ATF agent in the case. Jenkins' attorneys also criticized Cox's motion, saying that he was employing "inconsistent, even hostile, defense strategies" and asking to be tried separately from Krop, which was granted on August 31, 2023. Gallagher dismissed the federal indictment against Krop in May 2024, stating that his
right to a speedy trial was violated; federal prosecutors filed new indictments against Krop later that month. Krop was acquitted on all counts in October 2024. In May 2024, following the jury's guilty verdict in the
Trump hush money trial, Cox called on the
Maryland Republican Party to censure former governor
Larry Hogan for calling on elected officials to not "pour fuel on the fire with more toxic partisanship" amid the ruling. In November 2024, after Trump won the
2024 presidential election, Cox told
The Daily Record that he was being considered for
U.S. Attorney for the District of Maryland. If appointed to the seat and confirmed by the
U.S. Senate, Cox told
The Baltimore Sun that his priorities would include prosecuting sex trafficking and criminal gangs, such as
MS-13, and ensuring Maryland elections are transparent.
2024 congressional campaign In May 2023, Cox said he was considering a run for Congress in
Maryland's 6th congressional district in
2024, seeking to succeed outgoing U.S. Representative
David Trone. On July 3, 2023, someone filed paperwork with the
Federal Election Commission to enter Cox into the 2024 election, which prompted him to report the filing to the FEC for fraud. According to a
Daily Beast investigation, it was Cox's campaign treasurer, Tom Datwyler, who filed the FEC paperwork on his behalf after creating fundraising ads on
WinRed for Cox's congressional campaign. Datwyler was told by Cox advisor Rory McShane to terminate the FEC filing the next day, saying that Cox had decided against running in 2024. Despite these emails, Cox announced that he would run for Congress on October 30, 2023. Cox was seen as a frontrunner, alongside former state delegate
Neil Parrott, in the Republican primary, calling the
ongoing criminal cases against Trump a "witch hunt" and continuing to promote disproven conspiracy theories that the 2020 presidential election was marred by fraud, and ran on a platform including immigration, crime, and opposing
COVID-19 pandemic health restrictions. Cox struggled to build a coalition of voters without the outside support he received during his 2022 gubernatorial campaign and was defeated in the Republican primary election on May 14, 2024, ==Political views and statements==