Barack Obama’s move to the White House was largely due to his success with young people. That’s the case in more than just his general election victories, too.

According to Iowa caucus entrance polls in 2008, “young voters preferred Obama over the next-closest competitor by more than 4 to 1,” Time wrote. “This suggests that the under-25 set—typically among the most elusive voters in all of politics—gave the Illinois Senator a net gain of some 17,000 votes. Obama finished roughly 20,000 votes ahead of former Senator John Edwards and Sen. Hillary Clinton.”