(CN) - Sen. Bernie Sanders continues to rack up wins in the west in the contest for the Democratic presidential nomination, scoring decisive victories Saturday in Washington state, Alaska and Hawaii.
The Vermont senator soundly defeated Hillary Clinton in Washington state, 73 percent to 27 percent.
Meanwhile in Alaska, Sanders won with 82 percent of the vote, compared to Clinton's 18 percent, and in Hawaii, Sanders bested Clinton, 70 percent to 30 percent.
The race between the two Democrats now heads to Wisconsin, where Sanders on Saturday night assured rally attendees in Madison "We are on our path to victory."
"It is hard for anybody to deny that our campaign has the momentum," he told more than 8,100 cheering supporters at the University of Wisconsin campus.
Huge crowds turned out Saturday for Washington state's Democratic caucuses. In Seattle, thousands of voters in the dense Capitol Hill neighborhood forced party organizers to move caucuses from a ballroom venue to a neighborhood park and church.
Meanwhile, it was a cool, misty morning in Alaskan as caucus goers turned out in much larger than expected numbers to support their preference in the Democratic contest.
The huge turnout made for long lines, standing room only in caucus venues, and voting in overflow groups in hallways, parking lots and nearby parks.
As expected, "Last Frontier" Democrats are leaning heavily toward Bernie Sanders.
In Eagle River, Alaska nearly 500 people attempted to pack into a small conference area behind the public library in the community's Town Center, a space that looked as if it might comfortably accommodate half that number.
Voters spilled over into hallways and across the street in a municipal park while Jim Arlington, chairman of House District 14 and vote taker, was prompted to remind people the location of exits in case of emergency.
Some East Anchorage participants were clearly frustrated by a cumbersome process that forced them to drive several miles north of Anchorage to raise their hand with a colored post-it note for their preferred candidate, and then if selected as a delegate, head back across the municipality to the other caucus location at West Anchorage High School where voters in districts 15 through 28 held up their sticky notes.
One woman, a 66 year-old mental health therapist who hoped to be chosen as a delegate, but didn't want to give her name, was frustrated with the chaos and lack of guidance on the delegate process.
"I'm voting for Sanders," she said. "I volunteered on his first campaign when I lived in Vermont and I think he stands a better chance of beating Trump than Hillary."
A male friend of the therapist, Bob, 68, said he's not happy either with the process but he'll just "internalize it" rather than be vocal about it like others. A retired Army Vietnam Veteran, he also voiced his support for Sanders.
"He seems sincere." Bob said. "Hillary tries to be sincere but she's a political animal and I don't think she'll change things."