Speaking broadly, the whole trump thing is “Lieapalooza” but there are so many tentacles of lawlessness it’s hard to come up with a single “Gate”.
Octoscandal. Nah, too cerebral.
The NeverEnding Scandals. Well, yeah, duh. Maybe put a fluffy white beast around it.
Biggest Criminal Enterprise in US history. Nah, too big.
So many options.