You must bring people together.
Liz Cheney is not doing that.
You don't LEAD by publicly and repeatedly attacking the party -- or at least a large segment of it. You don't lead by giving aid and comfort to the opposition.
Liz Cheney has therefore forfeited her leadership position and she will be removed from it. She can, of course, continue to speak out forcefully as an individual GOP member of Congress and she is free as well to switch parties or become an independent of she so chooses.