Reeta. The race for the White House officially gets under way tonight, with republican supporters in Iowa Meeting to give their preference on who should be the candidate in november� s election. Donald trump is the firm favourite and has predicted a record victory. But, with temperatures in the state plummeting to as low as minus 30, turnout could be a factor. 0ur North american editor, sarah smith, has the latest. Expectations around Donald Trump ask i had this evening because polls suggesting he could win more support than all his rivals combined. Voters are flocking to him, driven in part by those criminal indictments against him, which many think are deeply unjust, but mainly the economy, voters who say they feel much worse off since Donald Trump left the White House. Will that drive them to caucus sites given