Hillary Clinton zinged President Donald Trump on Friday for requiring attendees at his planned rally in Oklahoma to waive their rights to sue his campaign if they catch the coronavirus at the event. “If your rallies come with a liability waiver, you shouldn’t be holding them,” Clinton tweeted. The rally is scheduled for June 19 at 19,000-seat Bank of Oklahoma Center in Tulsa. The campaign rally will be Trump’s first since March 2 in North Carolina, just before the coronavirus pandemic began triggering lockdowns of businesses and social events in the United States.