Bernie Sanders won the Nevada caucuses and is on pace to win the most delegates, giving the Vermont senator more ammunition to argue he’s the front-runner in the 2020 Democratic nomination fight.

Sanders on Saturday was winning about 45% of caucus support in early results, per calls by NBC News and Fox News. That provides a critical boost to his bid heading into the South Carolina primary in less than a week and a slew of contests days after on Super Tuesday, March 3.