The Republican establishment is on the verge of extinction. Donald Trump’s first term wasn’t enough to kill it off: Trump came into office in 2017 with establishment figures such as Mitch McConnell and Paul Ryan leading the party in Congress, and Trump’s own vice president, Mike Pence, had been chosen for that role as a reassurance to the old guard... This time, though, things are very different. Though congressional Republicans have yet to become thoroughly MAGA, there’s no longer a sense that GOP leaders in the House or Senate represent a distinct political brand of their own, as McConnell and...