Washington-The dispute over Donald Trump’s tax law draws a line under the close relationship of the US president with tech billionaire Elon Musk. “Elon and I had a great relationship. I don’t know if we will still have that,” Trump said to journalists in the White House. Musk struck back over his online platform X a little later: “Without me, Trump would have lost the choice.” And he added: “Such an ungrateful.”