The campaign to raise the U.S. minimum wage is gaining traction this election cycle. There are six statewide initiatives — four of them in Republican-controlled states — to raise the state wage floor above the federally mandated $7.25 per hour. “Activists on both sides of the issue say the proposals stand a good chance of passing,” writes Andy Sullivan.

This is where the initiatives are on the ballot:

The movement to raise the minimum wage has been a traditional policy initiative of the Democrats, with President Obama’s proposal to raise the minimum wage blocked by congressional Republicans. If multiple measures pass in heavily Republican states, however, Congress might feel pressure to reconsider the federal issue, says Sullivan. The ballot questions could also boost Democrats’ chances of retaining Senate control in the November midterms, adds Sullivan, by encouraging low-wage workers to come to the polls.

The last federal hike was in 2007, after Arizona, Colorado, Missouri, Montana, Nevada and Ohio, all successfully raised state minimum wages. If the current ballot initiatives succeed, an estimated 419,000 workers would get pay increases.