Congressional Republicans' loyalty to President Donald Trump appears to have hit a breaking point this week.

And with his endorsement against one of their own and his "anti-weaponization" fund, Trump may have created even more antagonists among the Senate GOP.

That's creating a potential math problem for Trump in the months ahead as the GOP looks to defend its majorities on Capitol Hill.

AI-generated summary was reviewed by a CNN editor.

The unavoidable clash between President Donald Trump’s self-serving and chaotic governance and Republicans’ political survivalism has arrived.