Elon Musk is ramping up his public support of Donald Trump, telling Tucker Carlson in a conversation streamed Monday that he is “all in” on the Republican presidential candidate. After appearing alongside Trump at a weekend rally, the world’s richest man used a cosy two-hour chat with Carlson to push right-wing talking points, including what he said was the threat to democracy if Democrat Kamala Harris prevails in November’s election. “My view is that if Trump doesn’t win this election, it’s the last election we’re going to have,” the Tesla and SpaceX boss told former Fox News host Carlson. Mu…