A wave of purple states — including Colorado, Arizona, and Maine — voted in wage hikes last election cycle.

A national group called the Fairness Project, funded by a California healthcare union, is taking that message to several states this cycle with minimum wage campaigns as well as ballot initiatives that would expand Medicaid and require employers to offer paid sick leave. They’ve calculated, based on data assembled by EPI, that wage increases implemented since the beginning of 2017 have put an extra $4 billion in workers’ pockets.

“While unemployment is low, we’re seeing pretty stagnant wages,” says Fairness Project director Jonathan Scheifer. “And the only places we’ve seen wage increases is where there’s been an increase in the minimum wage.”

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