But when it was time for the House of Representatives to cast their votes on Wednesday night, she failed to show up.
Ms Boebert was mocked on social media after she reportedly “narrowly missed the vote, running up the steps right as they gaveled”, according to Axios Capitol Hill reporter Juliegrace Brufke.
Spencer Soicher, a reporter from Ms Boebert’s home state of Colorado, pointed out that she had made 23 Twitter posts in the past week voicing her displeasure with the compromise deal.
Democrat Adam Frisch, who in 2022 lost his bid to unseat Ms Boebert in Colorado’s third district by just 546 votes, wrote on Twitter: “How can you represent #CO03 when you don’t even show up? What was more important than voting?”
Jon Cooper, who chairs The Democratic Coalition, tweeted: “Lauren Boebert was a vocal opponent of the bipartisan debt ceiling bill — but she ended up MISSING tonight's vote entirely. Is anyone surprised?”
Ms Boebert had earlier vowed to vote against the debt ceiling deal, saying on Tuesday that the bill was a “bunch of fake news and fake talking points” that did nothing to rein in federal spending.
“If every Republican voted the way that they campaigned, they would vote against tomorrow's bad deal.”
The House voted overwhelmingly by 314 to 117 to raise the debt limit, after Republicans were given concessions to cut IRS funding and increase work requirements on social spending programmes.
A total of 71 Republicans voted against the deal, along with 46 Democrats, avoiding an apocalyptic scenario where the US would default on its debts.
The bill now heads to the Senate, where a vote is expected to be held by Friday.
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