He won't but it seems win/win to me.

• I mean, he's not long for this world so he won't even really have to deal with the consequences.
• He'll definitely end up in the history books for centuries.
• We wouldn't have to deal with Trump anymore.
• The Republican party would be in chaos.
• There would almost certainly be a bipartisan push for a constitutional amendment to limit the ability of the President to do shit like that in the future.

The only potential downside I can see is that they might use Trump as a martyr to get someone even crazier and probably smarter elected.