In 2020, she unexpectedly defeated incumbent Scott Tipton in the primaries and won the general election over Democratic nominee Diane Mitsch Bush.

Boebert opposes transitioning to green energy, COVID-19 mask and vaccine mandates, abortion, sex education, gender-affirming surgery for minors, and same-sex marriage.

[30] In 2017, 80 people who attended a Garfield County fair contracted food poisoning after eating pork sliders from a temporary location set up by Shooters Grill and Smokehouse 1776.

The restaurants did not have the required permits to operate at the temporary location, and the Garfield County health department determined that the outbreak was caused by unsafe food handling at the event.

[38] In September 2019, Boebert made national headlines when she confronted Beto O'Rourke, a candidate in the 2020 Democratic presidential primary, at an Aurora town hall meeting over his proposal for a buy-back program and a ban on assault-style rifles like AR-15s.

[49][50][51] Seth Masket, a political science professor at the University of Denver, suggested that Boebert wanted to motivate Republican voters to participate in the primary during a slow election cycle by stirring up their anger at Ocasio-Cortez and others.

[52] Boebert decried what she said were Tipton's insufficient efforts to continue funding for the Paycheck Protection Program, whose money had run out within two weeks, arguing that more was needed.

[54] In a May 2020 interview on SteelTruth, a QAnon-supporting web show, Boebert said she was "very familiar with" the conspiracy theory: "Everything I've heard of Q, I hope that this is real because it only means America is getting stronger and better.

[1] Democratic Congressional Campaign Committee chair Cheri Bustos said in a statement that national Republicans should disavow Boebert for supporting QAnon.

[48] Boebert faced Democratic former state representative Diane Mitsch Bush, a retired sociology professor from Steamboat Springs, Colorado, in the November general election.

[64] Boebert emphasized her devotion to Trump and his policies and reiterated her points about deregulation of industries and decreasing healthcare funding,[66] while rallying for the expansion of gun rights.

[75] The filing, while misnaming the company involved, stated that her husband, Jayson, was paid $460,000 in 2019 and $478,000 in 2020 as a consultant for Terra Energy, one of Colorado's largest natural gas producers and fourth nationwide in methane emissions.

She also repeated claims of massive election fraud and invoked her opposition to the restrictions introduced as a result of the spread of what she called the "Fauci-funded China virus" (SARS-CoV-2).

[90][91] Several thousand Democrats tried to influence the election by renouncing their membership in the party and voting as independents for more moderate Republicans, which is allowed in the state.

[100][103] In 2023, she blamed her narrow 2022 victory on "'ballot harvesting' — a GOP term for third-party collection of absentee ballots — rather than what Democrats have called her 'MAGA extremism' and political charades" while her press releases focused on local issues, including a "$5 million grant for a rural health center in a spending package she voted against".

[104] Boebert announced on December 27, 2023, that she would switch to running in Colorado's 4th congressional district on the other side of the state, where political conditions are more favorable to Republicans.

[112][113] During the 2023 United States debt-ceiling crisis, Boebert was a vocal opponent of the Fiscal Responsibility Act of 2023 and vowed to vote "nay" on the bill, which passed in the House 314–117.

[120][121][122] Boebert made another attempt in June 2023, when she filed a privileged resolution to bypass House leadership and bring impeachment articles against Biden for his immigration and border protection policies to the floor for a vote.

[134][135] While the Capitol was being stormed, Boebert posted information on Twitter about the proceedings of the certification, including that the House chamber had been locked down and that Pelosi had been evacuated.

[142] Boebert additionally rejects the term "insurrection" for the January 6 events and has called the House inquiry into the attack a "sham witch hunt".

[81] She has equated the behavior of some of the rioters who participated in the Black Lives Matter (BLM) protests following the murder of George Floyd to those who attacked the Capitol.

[22][23] On January 1, 2021, in a letter co-signed by more than 80 Republicans, Boebert asked Speaker Pelosi and House minority leader Kevin McCarthy to uphold the 1967 law exempting members of Congress from a Capitol Hill ban on firearms, which allowed them to keep arms in their offices.

[156] After saying that she planned to carry a gun while working on Capitol Hill,[17][157] Boebert published a viral video advertisement showing her placing a handgun in a hip holster and walking through the neighborhood, near federal buildings and through alleys.

The article said that although she had only been in Congress for a few days, she had "already arranged several episodes that showcased her brand of far-right defiance as a conspiracy theorist" and that she "represents an incoming faction of the party for whom breaking the rules—and gaining notoriety for doing it—is exactly the point.

[194] She cited concern about a passage that urged social media platforms to prevent disinformation and violence, which she said was tantamount to making Big Tech the "arbiter of truth".

[149] Boebert has urged for even closer relations between Israel and the United States, saying that their foundings were divinely inspired and that they are the "two nations [in the world] that have been created to glorify God".

[203][204] During her primary campaign, Boebert argued for the repeal of the Affordable Care Act, also known as Obamacare,[205] and opposed the introduction of a single-payer healthcare system, saying it would harm small businesses like hers because of the prohibitive cost.

[223] A Congressional Research Service report released in March stated that "formally designating fentanyl as [a weapon of mass destruction] may not be necessary for additional executive branch action" but that Congress could consider legislation to "address 'perceived shortcomings'.

The first, introduced by Marjorie Taylor Greene, would criminalize providing sex reassignment surgery and other forms of transgender health care to minors; the second was the Stop the Sexualization of Children Act, introduced by Mike Johnson, which would prohibit federally funded institutions from promoting or instructing on LGBT issues or sexual orientation and is widely seen as a national version of Florida Parental Rights in Education Act.

[103][254][255] Boebert initially denied having vaped as well as causing a disturbance, writing on social media that she pleaded "guilty to laughing and singing too loud!"