Donald Trump speaks at a campaign rally in Fayetteville, North Carolina, Wednesday, March 9, 2016. Reuters

With 24 presidential nominating contests down, it’s easy to lose track of who has won what. Next week’s primaries in five delegate-rich states will be crucial for the remaining four Republican candidates. Here’s a breakdown of who has won which state contests and how many delegates thus far ahead of Super Tuesday 3.

Real estate tycoon Donald Trump is leading the race with 458 delegates, according to a tally published by the Wall Street Journal. That means the billionaire businessman is 779 delegates short of the required 1,237 to win the Republican nomination at the convention in Cleveland, and Tuesday’s contests in Florida, Ohio, Illinois, Missouri and North Carolina (the first two of those winner-take-all) could be key in his effort to seal the deal. Trump’s leading delegate count is a result of winning 15 out of 24 contests so far. He has claimed victories in New Hampshire, South Carolina, Alabama, Arkansas, Georgia, Massachusetts, Tennessee, Vermont, Virginia, Louisiana, Kentucky, Michigan, Mississippi, Hawaii and Nevada.

“There’s only one person who did well tonight: Donald Trump,” he said with confidence Tuesday night, after winning Michigan, Mississippi and Hawaii.

Trump’s closest rival is U.S. Sen. Ted Cruz of Texas, who has garnered 359 delegates thus far. The second-place Republican candidate needs 878 more to take the nomination. He has won Iowa, Oklahoma, Texas, Alaska, Kansas, Maine and most recently Idaho. A national NBC News/Wall Street Journal poll released Tuesday showed Cruz is locked in a tight race with Trump. Trump is the top choice of 30 percent of Republican primary voters, but Cruz is not far behind with 27 percent.

U.S. Sen. Marco Rubio of Florida is a distant-third in the delegate race with 151, putting him 1,086 delegates away from securing the nomination. The conservative senator has won just Minnesota and Puerto Rico. He faces a crucial winner-take-all primary in his home state next week with 99 delegates up for grabs, which could revive his campaign, or end it. A Fox News poll released Wednesday showed Trump is dominating the race in Florida. But two other polls released Thursday showed Trump’s lead over Rubio in Florida is shrinking.

Ohio Gov. John Kasich has just 54 delegates and needs 1,183 to win the nomination. He has not yet won a single state. Kasich is also hoping to declare victory in his home state’s winner-take-all primary Tuesday. A Fox News poll released Wednesday showed Kasich ahead of Trump in Ohio. Kasich has said if he doesn’t win his home state, he will quit the race.