A newly elected Democratic congresswoman has vowed to impeach Donald Trump, the US president, in an expletive-laced speech that has provoked outrage among Republicans. Rashida Tlaib, who was sworn in on Thursday, said "we're gonna impeach the motherf-----" during a celebration party with supporters. In a clip of the event circulated widely on social media on Friday, Ms Tlaib can be heard telling a crowd: "People love you. And you win. "And when your son looks at you and says, 'Momma, look you won, bullies don't win.' And I said, 'Baby, they don't,' because we're gonna go in there and we're gonna impeach the motherf-----." The US president responded in a tweet on Friday morning, saying: "How do you impeach a president who has won perhaps the greatest election of all time, done nothing wrong ... and is the most popular Republican in party history?" Rashida Tlaib called Donald Trump 'a direct and serious threat to