It is time to stop blaming third parties. The truth is that congress is able to rein in Trump any second they want.

The reason they don't is that they know that they will get primaried and lose their seat for someone more aligned with the people and Trump.

> they will get primaried

Primaries are kinda insane though. It basically means that a small minority of voters control who actually is allowed to stand for election under a party banner. Like, I understand how it ended up this way, but it's having really bad consequences.

That being said, if you could fix gerrymandering, a lot of the issues with primaries go away, as there would be more competition in the actual election which would dis-incentivise proposing extremist candidates in the primary.