Donald Trump and Elon Musk have been nearly inseparable since the election [Video]

For two weeks, Donald Trump has welcomed Elon Musk into his world. On Tuesday, it was Musk’s turn to play host to the president-elect.Trump flew to South Texas to watch as Musk’s SpaceX launched a Starship rocket near the Mexican border. Trump listened intently as the world’s richest man explained how the test would work and demonstrated with a model. And then Trump squinted into the bright sky to watch liftoff.It didn’t go perfectly -– the reusable booster did not return to the launch pad as it had done on a previous test last month. Instead, the booster was directed to a splashdown in the Gulf of Mexico.But Trump’s presence at the launch was a remarkable display of intimacy between the two men, one with implications for American politics, the government, foreign policy and even the possibility of humans reaching Mars.Musk spent around $200 million to help Trump beat Democrat …