A wave of efforts to raise the minimum wage at the state and local level will run through November, when voters in several states could consider ballot measures to raise hourly rates higher than the current $7.25 federal rate.

This is the second year in a row that states have picked up the pace of increasing the minimum wage, after President Barack Obama’s proposal to increase the federal rate to $10.10 an hour stalled in Congress.

Since the year began, these states have approved minimum wages that are higher than the federal level: Connecticut ($10.10), Delaware ($8.25), Maryland ($10.10), Minnesota ($9.25) and West Virginia ($8.75). The District of Columbia raised its rate to $11.50.

When these measures go into effect next year, half the states will have minimum wage rates higher than the federal level.

The last time this many states had rates higher than the federal level was in 2007, when 23 states and the District of Columbia were higher. That year, Congress raised the minimum wage from $5.15 to $7.25 an hour, in three stages over two years.

A full-time $7.25-per-hour minimum wage employee earns $15,080 annually. A person earning $10.10 (Obama’s proposal) would earn $19,777. For comparison, the poverty line in 2013 was $11,490 for a single person and $23,550 for a family of four.

“This has not happened often, primarily because prior to the 1990s, most states just used the federal minimum,” said David Cooper, an analyst with the Economic Policy Institute, a labor-backed organization that supports a higher minimum wage. Some of the increases at the state level in 2007 spurred momentum for the federal increase, he said.

So far this year, 34 states have or are now considering increases to their minimum wage, according to the National Conference of State Legislatures’ database. Measures are still advancing in Hawaii, Illinois, Massachusetts and Vermont.

Tennessee and Idaho had the highest percentages of hourly paid workers earning at or below the federal minimum wage in 2013, according to federal figures. Washington, California and Oregon have the lowest percentages of workers paid at the federal rate, largely because these three states have the country’s highest rates.

Of all states, Washington state currently has the highest state minimum wage at $9.32, followed by Oregon at $9.10. California’s rate of $8 an hour will increase to $9 on July 1 and then jump again to $10 an hour on Jan. 1, 2016, under legislation enacted last year.

Obama has moved his campaign for a higher minimum wage beyond the halls of Congress, where he first made the pitch in his 2013 State of the Union address. “States, counties, cities across the country are working to raise their minimum wage as we speak,” the president said in March at an event with four Democratic New England governors, a sentiment he repeated in remarks in Michigan this month.

The states that have passed minimum wage increases this year are dominated by Democratic governors and legislatures. The same was true last year, when California, New York and Rhode Island increased their minimums.

In November, voters in New Jersey approved a ballot measure raising the minimum wage after Republican Gov. Chris Christie vetoed a legislative effort.

States controlled by Republicans could see action, too. Organizers are trying to get measures on the November’ ballot to raise the minimum wage in the GOP-dominated states of Alaska, Idaho, Michigan and South Dakota. Supporters in Nebraska are weighing a ballot measure after the minimum wage effort died in the legislature, which is officially nonpartisan.

States with split political control where minimum wage ballot proposals are circulating include Arkansas and Missouri, where the governors are Democrats and the legislatures are GOP-led. Efforts also are underway in the blue state of Massachusetts to put a measure to voters if the legislature fails to raise the minimum wage.

Minimum wage hikes have been popular with voters: Since 1996, proposed increases have been on statewide ballots 15 times in 11 states — and all but two of them were successful, according to the Ballot Initiative Strategy Center, a Washington, D.C., group that supports a higher minimum wage.

In the past, minimum wage measures on the ballot during a nonpresidential election year have increased turnout among Democrats and swing voters, said Josh Levin, the center’s vice president. That’s one reason Democrats are expected to keep the issue alive for the November midterm elections, when 36 governorships and legislative seats in 46 statehouses will be contested, along with all 435 U.S. House seats.

Mike Saltsman, a research director at the Employment Policies Institute, a conservative nonprofit think tank that opposes a minimum wage increase, said Democrats want voters to think about the minimum wage and not the Affordable Care Act. “They are trying to change the conversation away from Obamacare,” he said.

In some states where minimum wage measures faltered, cities are responding. Portland, Maine, and Las Cruces, N.M., are considering higher hourly wages, in part because Republican governors in those states last year vetoed measures to increase the state minimum wage.

Even if a state has recently raised its minimum wage, the cost of living is so high in some cities that the new minimum wage isn’t enough to live on, resulting in city campaigns, said Paul Sonn, general counsel at the National Employment Law Project, an advocacy group that supports higher wages. Some 120 cities have enacted “living wages” that set a minimum standard for businesses that receive city contracts. City minimums range from $9 to $16 an hour.

The high cost of living in and around the nation’s capital, for example, prompted a coordinated effort for higher rates by Washington, D.C., ($11.50 by 2016), Montgomery County, Md., ($11.50 by 2017) and Prince George’s County, Md. ($11.50 by 2017).

— Stateline.org