Washington, June 6 -- President Donald Trump and Elon Musk took swipes at each other on Thursday, laying bare the fissures between the two in the days since the latter left his role at the White House. Trump said he was "disappointed" by Musk's opposition to the tax-cut and spending bill. "Look, Elon and I had a great relationship. I don't know if we will anymore," he said. Musk in turn said Trump would have lost the election without his support. "Such ingratitude," Musk said in a post on X. Book 2...