Representative Lauren Boebert, the far-right firebrand, faced off against eight Republican opponents on Thursday night in a debate in the new Colorado district she is seeking to represent in Congress.

After barely managing to win re-election in Colorado’s Third Congressional District against a Democrat in 2022, she is running this year in a much more conservative district, the Fourth. On Thursday evening, Ms. Boebert appeared at ease delivering fiery rhetoric and espousing her pro-Trump, hard-right stances among similarly conservative peers at the debate in Fort Lupton.

“Everyone will talk like a Freedom Caucus member, but there is only one who governs as a Freedom Caucus member,” Ms. Boebert said in her opening statement, adding that she did not expect a “coronation” in her new district and that she looked forward to “earning your vote.”

But Ms. Boebert also faced steady criticism from her rivals about switching districts — having relocated to the other side of the state to improve her chances after a strong primary challenger emerged in the Third District.

State Representative Mike Lynch suggested that Ms. Boebert was a “carpetbagger” after she brought up a drunken-driving arrest that forced Mr. Lynch to step down on Wednesday as the minority leader for Republicans in the statehouse.

The candidates mostly avoided mentioning what had landed Ms. Boebert in their district in the first place: an incident in September in which Ms. Boebert — then in the midst of completing her divorce with her husband — was caught on a security camera vaping and groping her date at a performance of the musical “Beetlejuice.”