A protester waves a folding fan while standing in front of a California National Guard outside the North Los Angeles Federal Building during a “No Kings” protest on June 14. Photo: Stephen Lam/San Francisco Chronicle via Getty Images It’s perfectly fine — at times necessary, even — to start our legal assessment with an acknowledgment that we just don’t know for sure. That’s especially true in the Trump era , as the president routinely seeks opportunities to push the outer boundaries of