AP: Bernie Sanders wins Alaska, Washington Democratic caucuses

Bernie Sanders has won the Democratic presidential caucuses in Washington state. It's the Vermont senator's second victory over front-runner Hillary Clinton in the three states holding party caucuses Saturday.

Sanders earlier won the Alaska caucuses. Hawaii is the third state holding a Democratic contest Saturday.

Sanders hopes the weekend votes will give him a boost in his efforts to make a comeback against front-runner Clinton.

Sanders has consistently drawn his strongest support from liberal voters and young people. Most of his victories have been in states with largely white populations and in states with caucus contests, which tend to attract the most active liberal Democrats.