Trump under dire for Twitter attack on congresswomen of colour

US President Donald Trump took aim at progressive Democratic congresswomen Sunday, telling them to "go back" where they came from in remarks that sparked yet another firestorm over his views on race and immigration. Trump – whose comments were branded "racist" and "xenophobic" by Democratic presidential candidates and senior legislators – last year reportedly referred to countries in Africa as "shithole" nations, and has spoken of an "invasion" of migrants. Catherine Clifford reports.