Not him specifically, but there are multiple plans and machinations in motion, by other Republicans, to stack every level of government with 10s of thousands of loyalists who will do whatever they want, so that if he tried 2020 again, they'll just roll over and enact it.

A lot of our best institutions are based on gentleman's agreements. If our representatives must ignore the processes we've come to expect, because those processes were never actually written down or coded into law... Yeah, the president has an unbelievable amount of uncheckable power to make the government just not run as intended.

The basic hypothesis is that if the president did something treasonous, he could be arrested by the military, who are sworn to protect the Constitution.

He couldnt change the rules, because our legislators do that, and its all written in the Constitution. But he could fail to appoint people, appoint people to multiple cabinet positions, or some other weird ways to get around this.

They're similar to the shit he's tried before. If people do their jobs there's no room for him to succeed.

No, what you're reading here is over the top fear mongering to try and get people to vote for their side. That why everyone who doesn't toe the line are now "facist." Because if you can get people to become afraid they'll vote against their own interests (and as much as they like to claim they do, the DNC in no way is working in our own interests)