Claims of sovereignty are meaningless, what happens is whether those claims hold up in real life, and in this case they clearly don't.
A country is either powerful enough to enforce sovereignty, or it is not actually sovereign; so this hand-wringing about "Venezuela's sovereignty" is meaningless. It's already been proven false, to some extent.
The US is free to do what it wants with Venezuela, or virtually any non-nuclear country in the world. Always has been, really. It simply doesn't exercise said power very often.
