President Donald Trump is working to tighten his grip on his party this week as he faces an unusual threat from Congress: an embarrassing rebuke of his military actions overseas.

Republicans in the US Senate on Wednesday dealt an all-but-certain defeat to a rare war powers resolution that would have curbed President Donald Trump's authority to use military force in Venezuela.

The procedural gambit saw two GOP senators who broke ranks with their party and Trump last week — Sens. Josh Hawley of Missouri and Todd Young of Indiana — switch sides to help defeat the resolution.