It's probably not helpful for me to speculate, but surely this? If the US is truly prepared to invade another ally's territory for material gain, I'd assume the idea that they'd honor other existing laws is unlikely.
If the US doesn't have checks and balances to stop it invading a democratic ally with no cause, then I don't know what checks and balancing meaningfully can be said to exist.
Hopefully we won't find out.
my sense is that Trump feels to be above the law right now, having ordered the operation to seize Maduro without Congressional approval (illegal under U.S. constitutional law). Trump's reasoning was that "Congress has a tendency to leak", and so to him congress seems little more than background noise.
The entire mode of operation for the current administration is to ignore such things whenever they don't blindly rubber stamp or get out of the way. It has been very successful for them.