This is cnn newsroom with michael holmes. Iowas caucuses, the first Nomination Test ahead of the president ial elections. A just released poll finds Donald Trump continues to keep his Iron Grip on iowa republicans. The final Des Moines register nbc News Poll shows donald Trump Support at 48 . Nikki haley second at 20 , ron desantis, third at 16 . But iowa is coping with a vicious Winter Storm which has brought Blizzard Conditions and brutal cold across the state, candidates forced to cancel many events before the push of the caucuses. The Arctic Blast will be in place monday and there are concerns about turnout. High temperature is forecast to be negative 2 degrees fahrenheit, negative 16 degrees