Trump Jr. heckled off stage — by Trump’s own supporters

Donald Trump Jr. was heckled — by his father’s own supporters — during a book-tour stop over the weekend, a report said Monday.

President Trump’s eldest son was on stage in a lecture hall at the University of California on Sunday to promote his new tome, “Triggered: How The Left Thrives on Hate and Wants to Silence Us,’’ when the 450 people in the audience were told there would be no Q&A session with him “due to time constraints,’’ the Guardian said.

The White House’s most conservative supporters, who had chanted “USA! USA!” when Trump Jr. walked on stage, soon started yelling, “Q&A! Q&A!”

They refused to stop, even as Trump Jr. tried to argue that if he did a question-and-answer session, the Republican administration’s liberal enemies would twist his answers to suit their own agendas.