Acting Nassau District Attorney Madeline Singas has collected $680,000 in political contributions since January as she seeks a full elected term in the county's highest-profile race, according to campaign finance reports filed yesterday.

Singas, a Democrat, ended the Jan. 12 to July 11 reporting period with $796,754 in cash on hand. Her likely Democratic primary opponent, former Manhattan prosecutor Michael Scotto, raised about $110,000 and had $1,369 on hand, state Board of Elections reports show.

The report for the Republican nominee for district attorney, Hempstead Town Supervisor Kate Murray, was not available as of late Wednesday. But her town campaign account shows that she transferred $290,000 to her district attorney campaign fund.

In Suffolk's only countywide race, Democratic County Executive Steve Bellone, who is seeking a second term, raised $949,953 since early January and has $2 million on hand, his campaign said. Republican candidate James O'Connor said he will report having raised $60,000 to $70,000 since entering the race in May, and spending of about $5,400.

The filings, which were due Wednesday at midnight for all state and local elected officials, also showed that fundraising by state Sen. Dean Skelos (R-Rockville Centre), the former majority leader, has slowed significantly since federal criminal charges were filed against him in May.

Skelos raised $218,007 since January, with the bulk coming before the charges against him. Since then, Skelos raised $19,500, and he got $50,000 from the Senate Republican Campaign Committee, the state records show.

Skelos resigned as Senate majority leader after he was indicted on bribery and extortion charges in May. He has pleaded not guilty.

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Gov. Andrew M. Cuomo, a Democrat, raised $5.2 million over the past six months and spent $1.3 million, leaving him with $12.7 million on hand.

Cuomo's report showed his campaign paid $100,000 to Morvillo Abramowitz, the law firm representing him in the federal probe of the Moreland Commission, a panel Cuomo established, then disbanded, that was to investigate election and campaign-finance law violations.

Wednesday also was the deadline for federal candidates to file quarterly reports detailing activity between April 1 and June 30. In eastern Suffolk County's 1st Congressional District -- where two Democrats are already hoping to face Rep. Lee Zeldin (R-Shirley) next year -- candidates raised large sums.

Zeldin raised $568,083, and had $838,478 in cash on hand, his campaign reported.

Democrat Anna Throne-Holst, the Southampton Town supervisor, raised $512,580 over five weeks since she declared her candidacy for the seat. Her donors included U.S. Sen. Kirsten Gillibrand (D-N.Y.), and Rep. Steve Israel (D-Huntington), her Federal Election Commission filing showed.

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Throne-Holst is vying for the Democratic nomination with venture capitalist David Calone, whose campaign has said he raised $470,000.

In the 2nd Congressional District, Legislature Presiding Officer DuWayne Gregory (D-Amityville) exceeded his $10,000 goal by raising $60,627 in the past month for a race against veteran Rep. Peter King (R-Seaford), filings show.

King reported having $2.8 million at the end of March. King hasn't yet filed his latest report.

With Tom Brune

and Yancey Roy