Watch: How Trump and Musk's break-up played out in real time

Tensions escalate between US President Trump and Elon Musk as they trade insults on social media. Trump expresses disappointment over Musk's criticism of a spending bill during a meeting with the Chancellor of Germany. Musk fires back, saying Trump would have lost the election without him. The feud intensifies following Musk's exit as a special government employee in the Trump administration.