Davis was appointed to chair the legislative committee for the O'Fallon Business Association in 1992. She was elected to the O'Fallon Board of Aldermen in 1994, serving as its president in 1995 and was thereafter elected to five consecutive terms. Davis was elected to the 19th district seat in the Missouri House of Representatives in 2002. After defeating fellow Republicans Marilyn Field and Mark Haynes in the August primary, she ran unopposed in the November general election. Davis was reelected in 2004, 2006, and 2008. While a member of the House Davis served on the following committees: Chairman of the Children and Families Committee, Chairman of the Interim Committee on Poverty, Member of Healthcare Policy Committee, State Parks and Waterways Committee, Vice-chair of the Healthcare, Policy Committee, Elections Committee. Additionally, she served as the Missouri House
majority whip. Among the bills filed by Davis one called for a state ban on elective
abortions. She said the bill would "protect public safety, health and welfare". Representative Davis, along with fellow representative
Tim Jones were among a number of politicians to support a "
Birther" lawsuit by attorney/dentist
Orly Taitz against President
Barack Obama and various members of his administration. The lawsuit was dismissed by Federal judge David Carter. In 2004 Davis used campaign funds to pay the property taxes on a home in
Jefferson City, Missouri. She paid a $1,000 fine to settle a finding by the state Ethics Commission that violated campaign finance laws. Due to Missouri's term limit rules, Davis was ineligible to run for the House seat again in 2010. She lost a Republican primary race for state senator in 2010, receiving 12,494 votes, or 45.4%. Davis left the Republican party in July 2011, joining the
Constitution Party. In a letter to the Republican Central Committee she cited among her reasons for making the switch were pandering over principles, government of the highest bidders, and blocking fair party nominations. Further, she claimed that both the Republican and Democratic parties had "become destructive to our rights and freedoms". Speaking on her party switch, according to Davis, Democrats and Republicans have locked into a vicious cycle of abuse and "..both have treated us with what is known as the battered wife syndrome, when people get beaten up and before the court date they kiss and make up and everybody is happy again. Then they get to court and police officers have documentation that they saw the broken window and the body go through the window, they have pictures of the black eye and the fat lip and the broken arm, but by the time the court date comes, like my grandmother would say, 'tweren't nothing'". She received 63,390 votes, or 2.37%. On March 29, 2016, she filed as a Republican to run for the U.S. House of Representatives in
Missouri's 3rd Congressional District, the only person challenging incumbent
Blaine Luetkemeyer in the Republican primary. She lost the primary with 26.54% of the votes. == Lunch controversy ==