President Trump and House Republicans cheered when Rep. Jeff Van Drew of New Jersey joined their ranks midway through his first term. But Van Drew’s voting record since then hasn’t been that of a down-the-line Republican.

As a Democrat first elected to an open seat in southern New Jersey in 2018, Van Drew was one of two in his party to oppose Trump’s impeachment. That approach aggravated Democrats in his district, and after torrents of criticism at home, Van Drew became a rare party-switching member of Congress, making the change official on Jan. 7.