https://www.reuters.com/article/usa-trump-socialmedia-digital-world/trump-deal-delivers-420-million-windfall-for-dealmaker-idUSKBN2HB2VC >A merger with former U.S. President Donald Trump's new social media venture has delivered a potential windfall of $420 million for a former finance executive who has been trying for a decade to reinvent himself as a serial dealmaker.