Des Moines, February 2 (RHC)-- In the U.S. presidential race, the Iowa caucuses saw an upset victory for Republican Senator Ted Cruz over front-runner Donald Trump and a virtual tie between Hillary Clinton and rival Bernie Sanders.

The latest returns show Clinton leading Sanders by less than half a percentage point, a result that would split Iowa’s delegate votes for the Democratic nomination.

Addressing supporters, Sanders said Iowa has begun a "political revolution." He was able to catch up with Clinton in Iowa despite polls once showing him 40 points behind.

On the Republican side, Ted Cruz upset Donald Trump with the help of a strong evangelical turnout. Cruz called his win a "victory for the grassroots."