Washington, Oct. 17 -- A "dark day." A "betrayal." The "biggest mistake of this presidency," and "really delusional."

And that was President Donald Trump's fellow Republicans.

Trump's decision to pull American troops out of northern Syria - triggering a deadly Turkish invasion targeting the U.S.'s erstwhile Syrian Kurdish allies - has unmuzzled GOP lawmakers in a manner seldom seen since Trump entered the White House.

In a time when the threat of a caustic Trump tweet is enough to stifle open internal dissent, the extent and strong language Republicans are using to assail his policy is Syria has been striking.

A statistical measurement of the party's disgruntlement was on eye-catching display in in the House, which voted Wednesday by ...