Democratic candidate Bernie Sanders rallied voters in Pittsburgh, Pennsylvania, Monday, saying he could triumph in today’s contests if voter turnout is high.

Sen. Bernie Sanders: “All over this country, what we have found is that when voter turnout is high, we do very well. And I believe that if there is a high voter turnout tomorrow, we’re going to win here in Pennsylvania.”

A new survey from Harvard University’s Institute of Politics shows Sanders remains the most popular candidate among young people between 18 and 29. Polling director John Della Volpe told The Washington Post, “He’s not moving a party to the left. He’s moving a generation to the left.” Democratic rival Hillary Clinton meanwhile took aim at Republican front-runner Donald Trump during a campaign stop in Wilmington, Delaware.

Hillary Clinton: “So, Donald Trump says wages are too high in America, and he doesn’t support raising the minimum wage. And I have said, 'Come out of those towers named for yourself, and actually talk and listen to people.'”