USA Today reports voters in four states on Tuesday will consider ballot initiatives to raise the minimum wage, threatening to widen the disparity between the growing number of jurisdictions that have lifted their pay floors and the rest of the country. In Arizona, Colorado and Maine, state hourly minimums would rise to $12 by 2020 from a range of $7.50 to $8.31. In Washington, the pay floor would climb to $13.50 from $9.47 over the next four years. Polls in the four states generally show solid majorities supporting the measures.