The bipartisan group will challenge hard-right House Republicans in their home districts, running ads that accuse the lawmakers of holding antidemocratic positions.
Some of the former president’s most outspoken defenders will sit on the House’s main investigative committee, underscoring their high-profile roles in the new Republican majority.
Some of the same Republicans who were former President Donald J. Trump’s lieutenants in seeking to overturn the 2020 election led the charge against Representative Kevin McCarthy as speaker.