I was just discussing this yesterday, Delores, and how the Constitution's definition is quite narrow.
The argument made was that it depends on the interpretation of 'levying war', since what's happening now is an abolishment of borders without consent of the people, permitting non citizens to pour in - and now a new tactic, to be brought in - without screening for disease or criminal element or skills, etc. and to, in truth, steal the people's money. (not that there's much left)
To that end, there is no one in Congress who has the morality to stop this. Frankly, they don't have the power to do so anyway. We had a de facto coup long before this issue. There are too many constitutional abandonments to count and it seems we are ruled by force now. In other words, as badly as this hurts the American people - and some say it is the camel's back straw - it's only one of a thousand drops in the bucket.