Ezequiel Morfin is blunt when I ask what one thing finally broke the dam.

“We’re easy prey,” he said. “That’s how it feels — that people are getting picked off one by one. It became too much.”

Morfin, 52, is the son of Mexican American farmworkers, from Toppenish, south of Yakima. He and Chelsea Dimas, another child of farmworkers, are the first Democrats elected to the state Legislature from the Yakima area in more than three decades.

Outside of one district centered on Spokane, there have been zero other state or federal-level Democrats in the entire ruby-red expanse east of the Cascade Mountains since 2010.

There hasn’t been a Democrat in the Yakima area since the last ones were washed out in the Republican “revolution” of 1994.

“We finally broke through,” Morfin said.

Half the district’s voting-age residents are Hispanic.…