WASHINGTON (AP) - Democrats said Thursday they have the votes to pass a broad, five-year farm bill this week, despite the party's internal divisions and Republican outrage over tax increases to pay for it.

Support for the bill, which extends agriculture and nutrition programs, unraveled Wednesday as the White House threatened a veto, saying the legislation doesn't do enough to cut farm subsidies.

At the same time, farm-state Republicans who previously supported the bill have said they will oppose it because of a last-minute proposal to tax certain foreign-owned companies with U.S. subsidiaries. Those taxes would partially pay for $4 billion in food stamps and other nutrition programs.

Facing defeat from a loss of GOP support, House Agriculture Committee Chairman Collin Peterson, D-Minn., said Thursday that he had been up most of the night working with Speaker Nancy Pelosi, D-Calif., to gain votes from Democrats who have opposed certain parts of the legislation. Peterson and Pelosi agreed to shift money to international nutrition programs, for example, to gain support from Rep. James McGovern, D-Mass.

"My sense is there's not going to be many Democrats who vote against this," Peterson said. "We got the votes."

Republicans, though, have said they view the tax proposal by Rep. Lloyd Doggett, D-Texas, as a betrayal of the previously bipartisan effort to pass the bill.

With the business community lobbying vigorously against the measure, Treasury Secretary Henry Paulson wrote Congress Thursday saying the plan would cost U.S. jobs by disrupting foreign investment and ruining relations with trade partners.

"The tax proposal would raise taxes on foreign investment into the United States, thus discouraging such investment and the resulting job creation. Foreign-owned companies provide, directly and indirectly, millions of jobs in the United States," Paulson wrote to Rep. Jim McCrery of Louisiana, the top Ways and Means Committee Republican.

Doggett said the plan would not affect "legitimate multinational corporations that are not employing a haven to dodge American taxes."

Despite leadership efforts to unite the majority, some Democrats were still opposed. Rep. Ron Kind, D-Wis., was offering an amendment that would scale back subsidies in favor of conservation, aid for specialty crops like fruits and vegetables, and nutrition and rural development programs.

Agriculture Secretary Mike Johanns, citing the farm subsidies, said the legislation misses opportunity for reform.

The bill would ban subsidies to farmers whose income averages more than $1 million a year and stop farmers from collecting payments for multiple farm businesses, but an administration proposal would go further.

Peterson denounced the veto threat, saying the administration had "failed rural America and all Americans" by opposing a measure that has broad backing from agriculture, conservation, nutrition and renewable energy advocates.

The current farm law expires Sept. 30. The Senate is due to begin its consideration of the legislation in September.