Actually, there is no Republican Party anymore. There is The Trump Party, a few non-Trumper Republicans, and the Democrats. If the Trump Party ejects Cheney, maybe she'd like to caucus with the Democrats? Maybe Mitt Romney and Lisa Murkowski would like to join her? They would be welcomed!
Most in the Trump Party think their only path to reelection is to remain on the USS Trumptanic as it sinks into the chilly North Atlantic. But some old-school Republicans are not that stupid. They might want to be on the winning side.