PORTLAND — A new financial report shows that independent U.S. Senate candidate Angus King has investments that are valued between $4.8 million and $22.5 million, according to the Portland Press Herald.

In a 25-page financial report on file with the Senate Office of Public Records in Washington, D.C., King reported that he took in investment income of $234,000 to $2 million from Jan. 1, 2011, through May 14 of this year.

The report also said King earned about $256,000 in 2011 as a college lecturer, corporate director and legal consultant and from his pension from when he was governor, the Portland Press Herald reported.

King's wealth is expected to be an issue in the campaign, and some Republicans have cast him as a wealthy, free-spending liberal.

King made his fortune in 1994 when he sold an energy conservation company he founded and ran for governor. King's campaign manager, Kay Rand, said she doesn't think King's money is an issue for voters.

"I'm sure they'll be told over and over about his wealth, but I don't think that matters because they've known about that," Rand said. "They remember him being a good governor and they like him personally."

King was the only one of the three top candidates in the race to file a personal financial report with the Senate by May 15, as required. The Senate made those reports public this month.

The campaigns for Democrat Cynthia Dill and Republican Charlie Summers said their reports will be made available soon.