Good luck winning over the Democrats with legal arguments.
They make up the rules as they go along—the Republicans just follow them.
It's more about convincing We the People than it is about "winning over the Democrats", which is practically impossible. The Democrats (the real ones, the principalities and powers behind the curtain) like having that drooling moron in the White House.
1) He's completely controllable. He even admits it.
2) He's a great big upthrust middle finger to We the People.