

He does kind of have a ‘button’ in the form of the “football” that sends the order straight to the ICBMs silos but I’m pretty sure those are pre-aimed at Russian targets. He doesn’t push the button, an unthinking brainwashed military pawn does it. That is sent to more unthinking brainwashed military pawns who actually launch the missiles.
Tactical nukes would have to go through more people but they’d probably just follow orders too.
The dems run their party from the inside. As the eldest crypt keeper Schumer has control of a cadre of dem reps who will vote for whatever he tells them to. He has enough of them that he can often single handily win or sabotage (mostly what he does) whatever the democrat party is doing.
Schumer’s political platform is Israel First so he and Trump have been getting along swimmingly this term. That is why he won’t use his leverage to get impeachment votes.