The three Democrats looking to battle Republican Gov. Charlie Baker later this year are calling on the Massachusetts Gaming Commission to expand its investigation of Steve Wynn and Wynn Resorts to include campaign donations from 2014.

The Gaming Commission is reviewing Wynn's suitability for holding the lone eastern Massachusetts gambling license after a Wall Street Journal report detailed allegations of sexual misconduct going back decades. The commission's head investigator said a $7.5 million settlement with a manicurist was withheld from the team looking into the original suitability review in 2013.

The Gaming Commission is due to meet this afternoon, a day after Steve Wynn announced he is stepping down as CEO and chairman of Wynn Resorts.

"Given the undeniable evidence that Wynn Resorts successfully concealed information from the MGC in the past, we believe it is essential that the Commission fully investigate another likely violation of Massachusetts gaming laws by Wynn Resorts and Steve Wynn: their $2 million campaign contribution to then-gubernatorial-candidate Charles D. Baker, which Wynn Resorts funneled through the Republican Governors Association (RGA)," the three candidates for Massachusetts governor wrote in a letter released by the state Democratic Party.

The three Democrats running for governor are former Newton Mayor Setti Warren, former Deval Patrick aide Jay Gonzalez and environmental activist Bob Massie.

They pointed to the state gaming law that says no gaming license applicant can directly or indirectly contribute to a candidate.

Ed Bedrosian, executive director of the Gaming Commission, said the state Office of Campaign and Political Finance, an independent watchdog agency, has jurisdiction of the matter.

The three candidates cited a Wall Street Journal report from December 2017 saying RGA staffers discussed using money from Wynn to help a group supporting Baker.

Wynn donated $2 million to the RGA, and RGA later deployed $2.2 million to support Baker through the group, within the short period of time after Wynn's donation. The RGA gave the pro-Baker $5.7 million in total in October 2014, and $10.75 million during the cycle.

A former top staffer told the Wall Street Journal that Wynn's interest in building a Massachusetts casino was likely a "factor" in the RGA donation, while the RGA's general counsel told the newspaper that the Wynn donation was not used on Baker's campaign.

"The governor has never received any contributions from Mr. Wynn and called on the RGA to end its relationship with him following these deeply disturbing allegations, return any contributions from the current cycle and not solicit or accept any donations from him in the future ," Billy Pitman, a Baker campaign spokesman, said in an email. " The governor supports the Gaming Commission's ongoing review."

Just after the 2014 election, Baker praised the RGA, said its help made a "huge difference" in the election, according to the State House News Service.

After the allegations of sexual misconduct surfaced in a separate Wall Street Journal report on Wynn, Baker's campaign in January 2018 asked the RGA return any Wynn donations from the last election cycle, which does not include the 2014 election Baker won.

When he was running for governor in 2014, Baker expressed interest in having just one casino and said he preferred for it to be located in Springfield. MGM, a Wynn rival, is opening a casino in Springfield later this year.

Baker met with Wynn last year in Las Vegas, before the sexual allegations surfaced. At a Greater Boston Chamber of Commerce gathering, Wynn referenced the private meeting and praised the governor as "grounded" and a "moderate Republican."

After the sexual misconduct allegations came out, Baker said he was appalled and added if they are true, Wynn fell short of suitability requirements in Massachusetts casino licenses.

In a statement late Tuesday night, a Baker spokeswoman said Wynn Resorts' move to part ways with Wynn was the "right decision."

This was updated at 3:17 p.m. with comment from the Gaming Commission.