Janan Ganesh: “Since the Ukraine scandal emerged, it has been natural to assume total Republican commitment to Mr Trump. Such is the tribalism of a riven nation.”
“There is another scenario, though, and it does not stop at one or two Republicans peeling away. Instead, to save itself, the GOP establishment might desert Mr Trump as swiftly and unexpectedly as it bent the knee to him in 2016. Whether this manifests as the Senate supermajority needed for his ousting is still hugely doubtful. But there are other kinds of defiance: a staff exodus from the White House, senatorial refusals to defend him, the turning of implicated parties on one another.”
“Skeptics will say this requires the party to wake up from its cringing passivity. But it has been doing that, in fits and starts, for a while now.”

