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.

Elon Musk, the world’s richest man, threatened to fund primary challenges against supporters of President Trump's sprawling tax and spendng bill 'if it is the last thing I do on this Earth.'

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.