Donald Trump sought to sabotage Tuesday night"s Democrat presidential nomination contest in New Hampshire by telling his own supporters to vote in it and pick the "weakest" candidate. In New Hampshire, the second US state to vote, 40 per cent of voters are not officially registered as Republicans or Democrats, and can choose which party"s primary process they take part in. At a massive rally in the city of Manchester on election eve the US president said his followers who were not registered should go to Democrat polling stations. He said: "You have crossover in primaries don"t you? I hear a lot of Republicans here tomorrow will vote for the weakest candidate possible of the Democrats. Does that make sense? You people wouldn’t do that......