JPMorgan Chase on Friday flatly denied that its CEO, Jamie Dimon, has endorsed Donald Trump for president, minutes after the Republican nominee claimed on social media that Dimon had endorsed him. "Jamie Dimon has not endorsed anyone. He has not endorsed a candidate," Dimon spokesman Joe Evangelisti told CNBC in a phone call. Trump on Truth Social had posted a screenshot falsely claiming, "New: Jamie Dimon, the CEO of JPMorgan Chase, has endorsed Trump for President." The Trump campaign did not immediately respond to CNBC's requests for comment. Dimon has at times offered qualified praise f