Donald Trump has assigned Transport Secretary Sean Duffy a second job as interim caretaker of NASA after the president dumped his original choice to lead the space agency. Duffy has been locked in a war of words this year with Trump’s former space buddy,

President Trump announced Wednesday that Transportation Secretary Sean Duffy will temporarily lead the National Aeronautics and Space Administration, weeks after Mr. Trump withdrew an Elon Musk-linked entrepreneur as his pick to lead the space agency.

The president previously rescinded his nomination of Jared Isaacman as the space agency’s next leader, citing the entrepreneur’s ties to Elon Musk.

Musk promised to campaign against Republicans who voted for the bill, and Trump pondered whether to deport the South Africa-born billionaire. But after Musk announced over the weekend the formation of his planned third political party, the “America Party,” Trump seemed to feel less love or hate than pity.

Here's what it would take for Elon Musk to launch a third-party effort to represent what he called "the 80% in the middle."