WASHINGTON—Bernie Sanders won Democratic presidential caucuses in Alaska and Washington state on Saturday, victories he hopes will stoke a spring comeback against the commanding front-runner, Hillary Clinton.
The Vermont senator was trying to build his enduring support among liberal activists into a three-state sweep that could help him narrow a gap of 300 delegates won in primaries by Clinton. The two Democrats were also competing in Hawaii.
While Sanders faces a steep climb to the nomination, a string of losses for Clinton would highlight persistent vulnerabilities within her own party. Sanders continues to attract tens of thousands to his rallies—drawing more than 17,000 in Seattle this week—and has collected more than $140 million from 2 million donors.
