Predictions of a 'nasty' year ahead for US politics

Former White House chief of staff Mick Mulvaney says it's going to be a "nasty" year for US politics following Colorado and Maine's banning of Trump from state ballots. "There's going to be a chance that he may not be on a couple of different ballots going into the election," Mr Mulvaney told Sky News Australia. "I don't think it makes a real difference directly because these are not states that Donald Trump could win ... so it doesn't really change the outcome. "But it's just simply going to raise the temperature. "It's going to be a very, very interesting, very difficult year for electoral politics here in the United States."