Elon Musk and Donald Trump in fiery war of words

America's biggest bromance has broken up. Elon Musk and US president Donald Trump are stuck in a fiery war of words that kicked off on social media. Musk called for the president's impeachment and alleged Trump's name appears in unreleased files related to late billionaire sex offender Jeffrey Epstein. It is a feud sparked by Donald Trump's so-called "big beautiful" tax and spending bill which Elon Musk has spoken out against since leaving the White House last week. US correspondent Todd Zwillich spoke to Lisa Owen.