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Sanders will take the majority of Washington's 101 pledged delegates. With 30 percent of the vote in, the AP reports that Sanders leads Clinton by about 53 percentage points.

The win will help him make a dent in Clinton's delegate lead. Entering Saturday, Clinton had 1,223 pledged delegates, with Sanders at 946 delegates.

He made a strong play for the state, holding several rallies leading up to the caucuses.

Sanders has conceded that Clinton overwhelmingly defeated him in the South but said he’d perform better in West Coast contests.

Sanders won the Alaska caucuses earlier in the day. Hawaii also will cast votes on Saturday.