meeting with President
Ronald Reagan,
Bob Michel and
Bob Dole, 1985 Simpson was elected to the
United States Senate on
November 7, 1978, but was appointed to the post early on January 1, 1979, following the resignation of
Clifford Hansen, former
Governor of Wyoming from 1963 to 1967 who had succeeded
Milward Simpson, Alan's father who was Governor of Wyoming from 1955 to 1959, in the seat. From 1985 to 1995, Simpson was the Republican
whip, assisting
Republican leader of the United States Senate Bob Dole from
Kansas. He was chairman of the
United States Senate Committee on Veterans' Affairs from 1981 to 1985 and again from 1995 to 1997 when Republicans regained control of the Senate. He also chaired the Immigration and Refugee Subcommittee of Judiciary, Nuclear Regulation Subcommittee, Social Security Subcommittee, and Committee on Aging. with President of the United States
George H. W. Bush (center) and United States Senate member
Craig L. Thomas (left) Simpson was characterized as a moderate conservative by
The New York Times upon his death in 2025. He supported the
abortion-rights movement and in 1995 and 1996, he voted against a ban of late-term abortions that only exempted life-threatening conditions, rather than all physical health needs. However, he opposed federal funding for abortions by supporting the
Hyde Amendment. In the early 1980s,
illegal immigrants were prohibited from working in the United States, but employers were not penalized for hiring them as
unreported employment. Alongside
Democratic Party United States House of Representatives member
Peter W. Rodino from
New Jersey, Simpson was the main force
Rubén G. Rumbaut highlighted the irony of Simpson's derogatory characterization of Hmong in a 1999 study that showed that Hmong students in San Diego schools "outperform[ed] all native-born English-only American students". Reflecting on his work for the
American Sociological Association's
Contexts, Rambaut said, "One thing I know is that popular conceptions about immigrants and their assimilation don’t square with the facts." Rambaut saw Simpson's use of the word "indigestible" as indicative that Simpson was imagining an
assimilation where Hmong were absorbed into the more desirable
Anglo-Saxon race. Natsu Taylor Saito concurred: "[Simpson thinks] they [Hmong] should be fully 'digestible'; their purpose is to nourish settler society, not to change it."
Dwight Conquergood remarked Simpson's comments were typical of Western visitors to the largest Hmong refugee camp in
Thailand, the
Ban Vinai Refugee Camp. "Instead of seeing the Hmong as struggling within a constraining context of historical, political, and economic forces that have reduced them from proud, independent, mountain people to landless refugees, the Hmong are blamed for their miserable condition." In the most widely read book on Hmong people
The Spirit Catches You and You Fall Down, which chronicles a Hmong family's struggles with the US healthcare system,
Anne Fadiman draws a parallel between Simpson and the historical Chinese government, which also sought to assimilate the Hmong ethnic minority among them. "...[Simpson] sounded much like the authorities in China long ago who were grievously insulted when the Hmong refused to speak Chinese or eat with chopsticks." Simpson visited Ban Vinai for one day during his tenure on the immigration subcommittee. Simpson frequently derided immigrants and refugees for not meeting his standards for assimilation into white US cultural norms and was at the forefront of opposing immigration. From 1980 to 1996, Simpson was "the leading voice attacking family immigration" according to
Annelise Anderson of
Stanford University. Simpson advocated for removing sibling immigration entirely, on the basis that in the United States siblings were not "important relatives".
Christian Joppke dubbed Simpson "the Republican leader of immigration reform in Congress". In one effort to reduce undocumented immigration, Simpson proposed a national
magnetic strip-enabled identity card, an idea that was strongly opposed by both Democrats and Republicans, and likened to
Nazi Germany. Simpson championed the
Immigration Reform Act of 1995, which further restricted legal immigration avenues and the rights of immigrants, particularly staunching family reuinification, ostensibly in favor of degree-holding workers.
Vijay Prashad argued measures such as the slew of immigration bills Simpson supported were rather a new wave of
white supremacist sentiment, aimed especially at
Latinos and
Asians who were perceived by white Americans as "fundamentally 'immigrant' despite their generations-long presence in the United States". Simpson's 1995 bill "reinforce[d] the idea that immigrants are only wanted for their labor and not for their lives". Simpson resented the influence
American Association of Retired Persons (AARP) had on protecting senior social programs like
Social Security and
Medicare—once referring to AARP as "evil". In his youth, Simpson was a
Boy Scout and once visited
Japanese American Scouts who, along with their families, were
interned near
Ralston, Wyoming, during
World War II. He developed a life-long friendship with
Norman Mineta, who later served as a Democratic member of the U.S. House of Representatives from
California from 1975 to 1995 and as the
United States Secretary of Transportation during the
Presidency of George W. Bush from 2001 to 2006. Their friendship spurred Simpson to support the
Civil Liberties Act of 1988, which provided
reparations to Japanese Americans subjected to internment. Aside from their time in Congress, Mineta and Simpson also served on the
Smithsonian Institution's Board of Regents. Simpson voted in favor of the 1983
Passage of Martin Luther King Jr. Day establishing
Martin Luther King Jr. Day as a
federal holiday and initially voted in favor of the
Civil Rights Restoration Act of 1987, though he voted to sustain President
Ronald Reagan's veto. Simpson voted in favor of the
Robert Bork Supreme Court nomination and
Clarence Thomas Supreme Court nomination, the former of which failed. Simpson was considered as a potential vice presidential candidate for
George H. W. Bush in the
1988 United States presidential election. In March 1991, Simpson denounced
CNN (Cable News Network) journalist
Peter Arnett as a sympathizer for
Saddam Hussein over the latter's reporting from
Baghdad,
Iraq, during the
Gulf War. Simpson was harshly criticized for questioning Arnett's patriotism based on the latter's 1964 marriage to a
Vietnamese woman rumored, but never confirmed, to be related to
Viet Cong soldiers. At , Simpson was the tallest Senator in United States history until overtaken by
Luther Strange of
Alabama in 2017, 20 years after his retirement. Simpson would later claim to have shrunk to at age 85. ==Post-Senate career==