My sense is that most people don't know what's going on even in normal times, or at best would have some vague idea that the word "Venezuela" is in the news but

My sense is that most people don't know what's going on even in normal times, or at best would have some vague idea that the word "Venezuela" is in the news but not be able to explain what's happening, so they interpret the question to mean either "Do you support President Trump" (30% do no matter what he does) or "Do you support the U.S. in this conflict against Venezuela". Add to that the fact that most mainstream news and social media is now under the thumb of the administration and I have little hope of mass understanding of the recklessness of this move. Even people who should know better, like Congress, the CEOs of some of America's largest corporations, and SCOTUS, seem to think this is a phase that will pass if they just wait it out. I don't think the tide will turn until "average" Americans start feeling the pain intensely, which they haven't yet. For now it's just news happening in another part of the world.