They all labeled the action illegal and a violation of the Constitution, as it lacked legislative permission.
This doesn't mean they are against the action. Sanders said the same thing about Yugoslavia, then voted yes on NATOs bombing campaign that attacked hospitals, schools, and other non military targets.
They want to give their consent to the bloodshed.
Schatz is the only statement that makes his position clear.
Jim McGovern is stating the obvious, that this administration has done nothing to manufacture consent for these actions. Not that they can't be justified, but that Trump hasn't yet justified it.
"Trump’s war against Venezuela is illegal and endangers American military personnel. ... the Constitution requires congressional approval for any military action, and Trump neither sought nor has it."
Only Congress is allowed to endanger "American military personnel". Let's be clear here this action endangers everyone. It specifically endangers Venezuelans. The blowback as a result of this action and the likely continued actions to come, will endanger us, the American working class.
Now watch as a justification is reverse engineered in real time.