Bernie Sanders won two of the three states at play in Tuesday's Democratic presidential primary contests.
Sanders won the Idaho and Utah caucuses, while Hillary Clinton was victorious in Arizona's primary.
Sanders spoke to supporters at a rally in San Diego.
"When we began this campaign we talked about a need for millions of people to become involved in the political process," Sanders said. "Tonight in Utah, tonight in Idaho, and tonight in Arizona there are record-breaking turnouts."
Clinton addressed supporters in Seattle after her win in Arizona.
"We are determined that we're going to give back the hope that every American should have -- that their hard work will get them ahead, will enable them to have a better future," she said. "That's what we want for America."
Tuesday's election results bring the total delegate count thus far to 1,681 for Clinton and 927 for Sanders, according to the Associated Press' delegate tracker. As for superdelegates, Clinton currently has 467 to Sanders' 26.
A total of 2,383 delegates are needed to win the Democratic nomination.
On the Republican side, primary contests were held Tuesday in Arizona and Utah. Donald Trump won Arizona, securing all 58 of the state's delegates. Ted Cruz won Utah, pulling in the 40 winner-take-all delegates.
John Kasich, who came in third is both Republican contests, picked up zero delegates Tuesday.
A total of 1,237 delegates are necessary to win the GOP presidential nomination. Trump currently has 739 delegates, while Cruz comes in at 465. Kasich has collected 143.