Standing in front of DFL Gov. Mark Dayton's temporary Capitol area office, Republican gubernatorial candidate Jeff Johnson said he would try to reverse the massive unionization of child care and home health workers now underway in Minnesota if he became governor.

"I would certainly try," Johnson said. "It would be hard to reverse but not impossible."

Republicans, including Johnson, have long hammered on Dayton and DFLers in the Legislature for approving a measure to allow child care and home health care workers to decide whether to unionize. The resulting unions would negotiate with the state.

The controversial 2013 legislative vote was a top priority for the Service Employees International Union, which is working with home care workers, and the American Federation of State, County and Municipal Employees, which works with child care workers.

Last month, home health care workers approved unionization. Child care providers are organizing a unionization vote for next year.

Johnson and anti-unionization activist Jennifer Parrish, a child care businesswoman, both suggested that Dayton's support of unionization was "payback" for union support and contributions during the 2010 election.

Although a quid pro quo of support in exchange for administrative action could be illegal, Johnson said he was not accusing Dayton of any illegal activity.

Jeremy Drucker, spokesman for the Dayton campaign, declined to comment on Johnson's accusation of payback. But he did say the governor believes in child care providers' right to organize.

"Governor Dayton supports giving child care providers the chance to hold an election and decide for themselves whether or not they want to form a union. This right was guaranteed by the U.S. Congress in 1935," Drucker said in a statement.

Dayton, who has been in Minnesota politics for decades, has long been considered union-friendly and during his term and campaign has received significant support from Minnesota unions. He has not always, however, moved in lock step with union interests and before the 2010 primary, many unions supported one of his Democratic opponents.

Jennifer Munt, a spokeswoman for AFSCME, said Johnson position shows he is "against working women."

As to the accusation of "payback," she said "we support candidates who support workers...for us that is our fundamental value."

Updated to remove photo and fix a typo.