Republican voters brave record-low temperatures in Iowa caucuses

As the first major test of the Republican primary arrives, the candidates urged supporters to turn out for what is expected to be the coldest caucus on record. SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP Watch More on http://abcnews.go.com/ LIKE ABC News on FACEBOOK https://www.facebook.com/abcnews FOLLOW ABC News on TWITTER: https://twitter.com/abc #news #iowacaucus #trump #nikkihaley #rondesantis #republicans #abcnews