As Democratic delegates gathered for the launch of their convention in Chicago Monday, and less than an hour before he was expected to speak about the economy at a Pennsylvania event, former President Donald Trump unleashed his latest attack. Trump complained that the Democratic Party had invoked the “first ever ‘Coup’ in America,” and that he has been forced to fight against two contenders in the presidential election instead of just one. He was referring to Biden’s stepping down last month after a lengthy campaign, and endorsing Vice President Kamala Harris as his replacement as his party’s …