Kamala Harris was interrupted by a heckler during a speech at a Labor Day campaign rally at the International Brotherhood of Electrical Workers (IBEW) Local #5 training facility in Pittsburgh.Speaking after an introduction by Joe Biden, who hailed his decision as nominee in 2020 to select her as his vice president as “the single best decision I made as president of the United States of America,” Harris spent much of her time pleading her case that an administration under her would be more benefi