But the issue is what is the U.S., via President Trump, actually doing, not what is one Senator talking about. My impression is that Trump is pushing tariffs in order to increase nationalism through conflict, i.e., to maximize divides at national borders. It's the same reason he's creating problems for immigrants, including legal ones. (I know HN doesn't like politics, but sometimes politics is factually part of the issue; if HN didn't like IP, we couldn't just omit it from a discussion of routing without being dishonest about what was going on.)
Warren's comment isn't evidence that it's necessary, or evidence of anything but her opinion. Is there any evidence, such as a broadly accepted economic analysis, that it's 'necessary'? That there is a problem? What problem? How are tariffs the best way to solve the problem?