Capital & Main reviewed the 167 votes O’Rourke has cast in the House in opposition to the majority of his own party during his six-year tenure in Congress. Many of those votes were not progressive dissents alongside other left-leaning lawmakers, but instead votes to help pass Republican-sponsored legislation.

O’Rourke has voted for GOP bills that his fellow Democratic lawmakers said reinforced Republicans’ anti-tax ideology, chipped away at the Affordable Care Act (ACA), weakened Wall Street regulations, boosted the fossil fuel industry and bolstered Donald Trump’s immigration policy.

Consumer, environmental, public health and civil rights organizations have cast legislation backed by O’Rourke as aiding big banks, undermining the fight against climate change and supporting Trump’s anti-immigrant agenda. During the previous administration, Barack Obama’s White House issued statements slamming two GOP bills backed by the 46-year-old Democratic legislator.