BISMARCK, N.D. — Donald Trump won the North Dakota Republican presidential caucuses on Monday, adding to his string of victories heading into Super Tuesday.

The former president finished first in voting conducted at 12 caucus sites, ahead of former U.N. Ambassador Nikki Haley. The result puts Trump back on the winning track, which was briefly interrupted on Sunday when Haley notched her first victory of the campaign in the District of Columbia’s primary.

The White House hopefuls now turn their attention to Super Tuesday, when results will pour in from 16 states in contests that amount to the single biggest delegate haul of any day in the presidential primary. Trump and President Joe Biden, a Democrat, are dominating their races and are on track to winning their nominations later this month.

Under North Dakota’s rules, candidates are eligible to win delegates if they finish with at least 20% of the vote. However, a candidate who wins at least 60% of the vote receives all of the state’s 29 delegates.

Four candidates were on the ballot, including Trump and Nikki Haley. The other candidates, who have received little attention, were Florida businessman David Stuckenberg and Texas businessman and pastor Ryan Binkley, who recently ended his campaign.

Retired music teacher and librarian Karen Groninger, of Almont, said Monday that she voted for Trump, calling him the best choice. The 76-year-old cited Trump’s 2020 speech at the annual March for Life anti-abortion event in Washington, D.C. — the first by a sitting president — and his border policies.

Longtime Republican state Sen. Dick Dever, of Bismarck, said he voted for Haley, but added she’s unlikely to win. The retired factory representative, 72, said, “I hear an awful lot of people say that they really liked Trump’s policies but they don’t like the way he conducts himself, and I think he’s gone overboard a bit.”

Caucus voters were encouraged to be paying party members, but those who wouldn’t pay $50 for annual membership were asked to sign a pledge to affiliate with the party, caucus Chair Robert Harms said.

North Dakota is the only state without voter registration. The caucuses followed official state voter identification protocols, such as providing a driver’s license. Voting was done only in person and on printed ballots, which will be hand-counted.

In 2016, it was a North Dakota delegate who helped Trump secure the number needed for the Republican presidential nomination.