President Donald Trump is nominating Jared Isaacman to serve as his NASA administrator after all. The announcement comes five months after Trump withdrew the tech billionaire’s nomination, originally announced during the presidential transition, because of concerns about Isaacman’s political leanings. Over the summer, Trump said he was surprised to learn that Isaacman was a “blue-blooded Democrat, who had never contributed to a Republican before.” Trump made no mention of his previous decision to nominate and then withdraw Isaacman in his Tuesday evening announcement. Isaacman is close to tech entrepreneur Elon Musk. The president and Musk, a former adviser to Trump, had a very public falling out earlier this year, but are now on better terms.