Utahns stopped by polling locations across the state as Utah participates in the nation’s Super Tuesday primary elections for the first time, joining 13 other states, American Samoa and Democrats living abroad in a day that will allot over a third of the total delegates in the Democratic race for the presidential nomination.

The votes cast on this pivotal primary day will play a major role in deciding who challenges President Donald Trump in November. See Utah’s results here.

A pair of candidates visited Utah on Monday, including front-runner Vermont Sen. Bernie Sanders and Minnesota Sen. Amy Klobuchar — who dropped out of the race only hours later.

Sanders is expected to win Utah, according to recent polling including the Salt Lake Tribune/Suffolk University poll in January, with former New York City Mayor Mike Bloomberg, Massachusetts Sen. Elizabeth Warren and former Vice President Joe Biden trailing. A candidate can win at least some of Utah’s 29 delegates if he or she wins at least 15% of the vote statewide or in one of the four congressional districts.

In the Republican primary, Trump has one contender still in the race, former Massachusets Gov. William Weld, who visited the state last month.

Utah voters have until 8 p.m. to cast their ballots in person or drop off a mail-in ballot, though those in line to vote at 8 p.m. will still be allowed to cast a vote. Same-day voter registration is allowed in polling locations, with identification and proof of residency, according to Utah’s elections office.