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.”

Sen. Bernie Sanders: “I think the people of Iowa have sent a very profound message to the political establishment, to the economic establishment and, by the way, to the media establishment. The powers that be—Wall Street with their endless supply of money, corporate America, the large campaign donors—are so powerful that no president can do what has to be done alone. And that is why—and that is why what Iowa has begun tonight is a political revolution.”

Sanders 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.”

Sen. Ted Cruz: “Tonight is a victory for the grassroots. Tonight is a victory for courageous conservatives across Iowa and all across this great nation. Tonight, the state of Iowa has spoken.”

We’ll have more from Iowa after headlines.