Donald Trump beats Nikki Haley in three Republican caucuses

Former President Donald TrumpTrumpTrump continued his march toward the GOP nomination on Saturday, winning caucuses in Idaho and Missouri and sweeping the delegate haul at a party convention in Michigan.

Mr. Trump earned every delegate at stake on Saturday, bringing his count to 244 compared to 24 for former U.N. Ambassador Nikki Haley. A candidate needs to secure 1,215 delegates to clinch the Republican nomination.

The next event on the Republican calendar is Sunday in the District of Columbia. Two days later is Super Tuesday, when 16 states will hold primaries on what will be the largest day of voting of the year outside of the November election. Mr. Trump is on track to lock up the nomination days later.