If Trump says everything is great in the republican party I expect the opposite to be true. Are they imploding?
They're definitely having trouble. The contradiction between "help Israel" and "fuck everyone who's not American" hasn't mattered too much, until now.
It seems unlikely this will directly challenge their grip on power, though. It's one issue among many in a big tent party, with leaders interested in their own advancement and a base uninterested in anything east of Atlanta.