Elon Musk responded to Donald Trump's recent criticism by saying it was time for the former president to "hang up his hat & sail into the sunset."Musk commented via Twitter after sharing a story about Trump on Saturday night calling the Tesla and SpaceX CEO a "bullsh*t artist.""I don't hate the man, but it's time for Trump to hang up his hat & sail into the sunset," Musk tweeted Monday night. "Dems should also call off the attack – don't make it so that Trump’s only way to survive is to regain the Presidency."Musk's tweet came after Trump's appearance at...