It's a business as usual vs. Chaos election. Cheney being in favor of someone playing by the normal rules isn't that surprising.

This doesn't actually oppose their point that

I think it's indicative of just how far right the "left" have gone. We have no real representation.

"Business as usual" is right wing politics, even to the Democratic party at this point, which is supposed to be the left wing.

If you keep shifting right to pick up people like Cheney, eventually your policy will just be the same as Cheney and if anyone wants to go further right they have to go "just that insane" to seperate themselves because republicans are never going to shift left.