ATTORNEY GENERAL Maura Healey is sitting on a mountain of campaign cash, raising the question of what she’s going to do with it.

Healey’s campaign finance reports indicate she had $2.96 million in cash on hand at the end of December. That’s more than the $2.5 million Gov. Charlie Baker and Lt. Gov. Karyn Polito had combined together. Baker had $596,105 on hand and Polito had $1.9 million.

Baker and Polito turned heads with their fundraising during the month of December, with Baker taking in $165,418 and Polito collecting $165,944. It was Baker’s largest one-month haul in more than two years.

Yet Healey outdid them both, raising $168,921.

Aside from the December number, Healey has slowly built her campaign account over time.

Healey has long been rumored to be interested in running for governor. In November, for example, a report investigating improper involvement by the Massachusetts Democratic Party in the primary race for Congress between US Rep. Richard Neal and Alex Morse raised the issue indirectly.

According to the report, party chairman Gus Bickford met with Morse in the spring of 2019 at a South Hadley restaurant where he urged the mayor of Holyoke not to run against Neal and instead campaign for lieutenant governor if Healey runs for governor in 2022.

Danielle Allen, the director of Harvard University’s Edmond J. Safra Center for Ethics, launched an exploratory committee to run for governor in mid-December and by the end of the month reported campaign contributions of nearly $137,000, including $30,000 she loaned her campaign committee.

Somerville Mayor Joe Curtatone, a Democrat sometimes mentioned as a potential candidate for governor, had $20,895 in campaign funds on hand at the end of December.

Baker has not indicated yet whether he intends to seek reelection.