A Democratic super PAC has jumped into the rematch between Rep. Tim Bishop (D-Southampton) and Republican Randy Altschuler, after previous big-money buys by Republican groups.

The House Majority PAC, seeking to help Democrats regain control of Congress, is spending $260,000 on a new TV ad highlighting Altschuler's former company, OfficeTiger, which provided corporations with backshop workers overseas and in the United States.

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Bishop calls his opponent an "outsourcer," which the new ad repeats. Altschuler has said his firm only created jobs -- 750 in America and more than 3,000 overseas, largely in India.

The super PAC's new ad comes a week after a nonprofit advocacy group founded by Republican strategist Karl Rove spent $260,000 on an ad attacking Bishop. It highlights a controversy involving the Bishop campaign's contact with a constituent who sought the congressman's help with a permit.

Bishop denies violating House ethics rules that bar soliciting donations in return for official actions.

With the House Majority ad buy, independent groups have spent more than $800,000 in the 1st Congressional District. That includes $312,000 by a new super PAC largely funded by an East Setauket financier.