How?
Assuming you or I can hold a politician accountable between elections.
The truth is IMO politicians are not held accountable. They get elected in, do whatever crappy job they do, then they leave. That's pretty much the end of the story.
Even during elections it's a popularity contest. Never who'd most qualified, it's however can get the most votes.
The most accountability you're going to get is Trump will be removed from office at the whim of Washington politicians and Pence will take over. Big deal. Trump will go on with his life, maybe, well if you're impeached you can't run for office again, but if he resigns, then runs and wins as a Democrat, that would be hilarious.
It will never happen? That's how silly I think politics are.