Miller announced her candidacy to representIllinois's 15th congressional district in theUnited States House of Representatives in the 2020 elections to succeed retiring incumbentJohn Shimkus.[9] She won the Republican Party nomination,[10] the real contest in Illinois's most Republican district, and won the general election with over 70% of the vote. Miller focused her campaign on providing support to farming and bringing manufacturing back to Illinois.[11]
In May 2022, theWashington Examiner criticized Miller for employing Bradley Graven, "a man convicted of soliciting sex with a minor, to assist with her re-election campaign."[14][15] Graven was also seen driving Miller around, raised money for her campaign, and was reportedly responsible for collecting over half the signatures needed to qualify her for the ballot.[14][16]
After the2020 redrawing of the Illinois electoral map, Miller won the June 2022 Republican primary by approximately 14 points against fellow incumbentRodney Davis, whose more moderate views became a liability in the newly redrawn 15th district.[17] Miller had also been endorsed byDonald Trump; Davis had supported the ultimately unsuccessful formation of aJanuary 6 commission in May 2021.[18] Redistricting left her home inOakland just outside the district. Members of the House are required only to live in thestate they represent.
Miller won the Republican primary election unopposed. She also won the general election unopposed, as there were noDemocratic, independent, or third-party candidates.[19]
On January 6, 2021, when Congress met to formally count the votes of theElectoral College and certify the results of the 2020 presidential election, Miller was one of the members of the House of Representatives whoobjected to the votes of Arizona and Pennsylvania.[20]
In June 2025, Miller spoke out against aSikhgranthi leading the House of Representatives' daily prayer. Initially misidentifying the granthi as Muslim, Miller posted onX that it was "deeply troubling that a Muslim was allowed to lead prayer in the House of Representatives this morning. This should have never been allowed to happen. America was founded as a Christian nation, and I believe our government should reflect that truth, not drift further from it." Miller subsequently corrected her post to identify the granthi as Sikh before deleting the post altogether.[21]
Miller has accused PresidentJoe Biden of having a plan to "flood our country withterrorists,fentanyl,child traffickers, andMS-13 gang members", and also said that "under President Biden's leadership the left has weaponized the federal government to go after the American people. We face an unprecedented assault on the American way of life by the radical left."[29]
On January 5, 2021, two days into her House term, Miller issued a prepared speech to the conservative group Moms for America.[36][37] She quotedAdolf Hitler, saying, "Each generation has the responsibility to teach and train the next generation. You know, if we win a few elections, we're still going to be losing unless we win the hearts and minds of our children. This is the battle. Hitler was right on one thing: he said, 'Whoever has the youth has the future.'"[38][39]
A number of groups and politicians condemned the comment, criticized Miller, and urged the Republican Party to do likewise. Illinois GOP chairman Tim Schneider called her language "wrong and disgusting" and urged Miller "to apologize".[38] Public statements were issued by theU.S. Holocaust Memorial Museum,Anti-Defamation League (ADL),World Jewish Congress, and multiple lawmakers, includingAdam Kinzinger and Illinois governorJ. B. Pritzker.[40][41][42][43][44][45] U.S. representativeJan Schakowsky, U.S. senatorTammy Duckworth, and the Illinois legislative Jewish caucus called for Miller's resignation.[46][44][41] On January 14, Schakowsky said that she would introduce a measure to censure Miller.[47] ADL Midwest regional director David Goldenberg shared with Miller's office a list of 12 anti-Semitic incidents and 17 instances ofwhite supremacist propaganda in the 15th district in 2019 and 2020 in an effort to make Miller aware of "what was going on in and around her district", he said, including information about extremist activity.[48]
On January 7, Miller's officetweeted that her remarks had been intended to compare alleged youth indoctrination efforts by "left-wing radicals" to those of Hitler, while nonetheless encouraging Republicans to aggressively appeal to the youth as a means to collective power.[37] On January 8, Miller apologized for having quoted Hitler in the message, but accused critics of twisting her words.[36][49]
In March 2021, Miller introduced the Safety and Opportunity for Girls Act, which would bantransgender girls in schools from using bathrooms other than those of their sex assigned at birth.[50]
Miller criticized House speakerNancy Pelosi (D-California) on theEquality Act, which would prohibit discrimination on the basis ofsexual orientation andgender identity, saying, "She doesn't represent the American people, and Americans need to wake up and realize that the Left does not represent the traditional values of the American people."[51]
Miller voted against theRespect for Marriage Act, which codified parts ofObergefell v. Hodges. She wrote in a Facebook post, "This attacks the traditional family. All of these initiatives are deeply unpopular with the American people, and I will always vote NO against the radical agenda of the Left."[52]
In February 2025, Miller introduced RepresentativeSarah McBride (D-Delaware) bymisgendering her: "The chair recognizes the gentleman from Delaware, Mr. McBride, for five minutes."[53]
In June 2021, Miller was one of 21 House Republicans to vote against a resolution to give theCongressional Gold Medal to police officers who defended the U.S. Capitol onJanuary 6.[54]
In February 2022, Miller co-sponsored the Secure America's Borders First Act, which would prohibit the expenditure or obligation of military and security assistance to Ukraine over the U.S. border with Mexico.[55]
Miller voted against H.R. 7691, the Additional Ukraine Supplemental Appropriations Act, 2022, which would provide $40 billion in emergency aid to the Ukrainian government.[56][57]
In June 2021, Miller was one of 49 House Republicans to vote to repeal theAUMF against Iraq.[59][60]
Miller was one of 15 representatives to vote against H.R. 567: Trans-Sahara Counterterrorism Partnership Program Act of 2021, which would establish an interagency program to assist countries in North and West Africa to improve immediate and long-term capabilities to counter terrorist threats, and for other purposes.[61]
In 2023, Miller was among 47 Republicans to vote in favor of H.Con.Res. 21, which directed PresidentJoe Biden to remove U.S. troops fromSyria within 180 days.[62][63]
On March 19, 2021, Miller was one of 14 House Republicans to vote against a measure condemning theMyanmar coup d'état that overwhelmingly passed, for reasons reported to be unclear.[64]
Miller sponsored RepresentativeBrian Babin's bill, H.R.140 - Birthright Citizenship Act of 2021, which would eliminate birthright citizenship.[67]
Miller sponsored H.R. 6202, the American Tech Workforce Act of 2021, introduced by RepresentativeJim Banks (R-Indiana). The legislation would establish a wage floor for the high-skill H-1B visa program, thereby significantly reducing employer dependence on the program. The bill would also eliminate the Optional Practical Training program that allows foreign graduates to stay and work in the United States.[68]
In 2023, Miller voted for an amendment that would eliminate funding for immigration and refugee assistance.[69]
Miller introduced and sponsored H.R.1980 - Working Families Flexibility Act of 2021. This bill would cap the accrual of any non-union employee, per year, to 160 hours of compensated time off in lieu of overtime pay (the equivalent of 20 days of working 8 hours a day, or 4 weeks if calculated by a 40-hour work week) and prohibits the interference of employers with regard to forcing an employee to take the compensated time off.[71][72][73]
Miller sponsored H.R.6579 - Teamwork for Employees and Managers Act of 2022, which would require companies to put workers on the board. This has been described as "company unions".[74][75][76]
Miller expressed support for then-PresidentDonald Trump's protectionist trade policies, expressing the feeling that farmers were taken advantage of in past trade deals such asNAFTA.[77]
In 2022, Miller was one of 39 Republicans to vote for theMerger Filing Fee Modernization Act of 2022, an antitrust package that would crack down on corporations for anti-competitive behavior.[78][79]
In May 2024, Miller proposed an amendment to theUS farm bill that would repeal a legal change passed in 2018 that made it easier for US farmers to grow nonintoxicating varieties of cannabis, also known as "hemp," but which also had the effect of allowing products containingcannabinoids such asdelta-8 THC derived from hemp to be legally sold in the United States.[80][81] In a statement, Miller said she was "proud my amendment was included to close the loophole that has allowed drug-infused THC products like Delta-8 to be sold," while the Hemp Roundtable, a lobbying group that represents US hemp farmers, referred to Miller's amendment as "hemp industry-killing."[80]
In the118th Congress, she co-sponsored a pair of resolutions meant to expunge theimpeachments of Donald Trump.[84] In the119th Congress, she again co-sponsored resolutions to expunge Trump's impeachments.[85]
Miller is married tostate representativeChris Miller, who represents much of the eastern portion of his wife's district. They own a farm inOakland, nearCharleston, where they grow grain and raise cattle.[86][87] They have seven children and 23 grandchildren.[7][11] The Millers are members of Oakland Christian Church.[88][89]
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