Elon Musk’s feud with President Donald Trump has reignited, with the tech billionaire threatening to launch a new political party and Trump suggesting Musk could be punished for his opposition.

This week, Trump has said Musk would have to "close up shop and head back home to South Africa" if he halted government subsidies to his companies, and then later added that his administration would "have to take a look" at deporting Musk.

Donald Trump and Elon Musk exchanged back-and-forth insults online after a disagreement over the president's spending bill. Here's a complete timeline of Donald Trump and Elon Musk's friendship, including why they are now feuding.