The clash between U.S. President Donald Trump and Tesla (TSLA.US) founder Elon Musk on social media is escalating, with Trump recently hinting at possibly terminating his government's contracts. Musk immediately retaliated on social media platform X that SpaceX's manned spacecraft Dragon will begin retirement immediately.Two NASA astronauts, who had been stranded at the International Space Station for months aboard Boeing's (BA.US) Starliner spacecraft, returned to Earth in March via SpaceX's Dragon spacecraft.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)Related NewsTSMC Admits Challenges in Completing USD100B Investment in 5 Yrs During Talks with Trump