Two TV presenters attacked on Twitter by President Donald Trump have accused him of lying and suggested the White House tried to blackmail them. The hosts of MSNBC Morning Joe said they were warned a tabloid would run a negative story on them unless they said sorry for their coverage of Mr Trump. Mika Brzezinski and Joe Scarborough said Mr Trump's tweets were "vicious" and "frightening". The president called them "low IQ crazy Mika" and "Psycho Joe" on Thursday. He also referred to Ms Brzezinski as "bleeding badly from a facelift".