In Los Angeles, California, Donald Trump Jr. was heckled off stage during a book talk by his own supporters, who erupted in protest after he announced he would not be taking questions. President Trump’s son was at the University of California’s Los Angeles campus on Sunday to promote his book “Triggered: How the Left Thrives on Hate and Wants to Silence Us.” But it turned out to be his own right-wing fans who ended up silencing and driving the author off stage with hostile chants of “Q&A! Q&A!” — to the tune of the chant “U.S.A.! U.S.A.!” — after Trump Jr. said there would not be enough time for audience questions.