That's a bald way of putting it. But any more tepid or glossed description doesn't capture the fullness of what's happening. Government shutdowns, SCOTUS blockades, the mounting centrality of domination and force as the animating drivers of Republican politics - all stem from the same factors, the same politics of embattlement, threat and fear.
Some of this complements the work of Norm Ornstein and Thomas Mann on asymmetric partisanship and Republican radicalization. There's a reason why we have institutional breakdown, accelerating violations of longstanding governing norms, why one party - and yes, it really is pretty much one party - has simply been going off the rails for years now. The Republican party has slowly and now more rapidly moved into revolt against the governing order as it sees its electoral base contract.
All sound hyperbolic? I might have thought so too. But it's not. This is why Trump is the GOP nominee. And it will continue after Trump.