Pressed by President Barack Obama to support more revenue increases, congressional Republicans may relent on the carried interest loophole that tends to benefit wealthy Wall Street investors.

Despite the party’s long-standing resistance to tax hikes — particularly after compromising on the fiscal-cliff deal that allowed rates on higher earners to go up — some GOP sources say Republican members might agree to eliminate carried interest deductions because it would primarily affect wealthy Democratic campaign donors. The likely stiff resistance from New York Sen. Charles E. Schumer and other Senate Democrats would be a bonus. Republicans, sources say, are not motivated to protect contributors who have donated millions to their opponents.

Speaker John A. Boehner “can probably offer a carried interest amendment as one tax increase that is warranted,” said a Republican lobbyist with relationships on both ends of Capitol Hill. “If we are forced into a sequester conference that demands taxes, Democrats can screw their big, rich donors.”

A second Republican lobbyist said agreeing to close the carried interest loophole could serve as a GOP concession on taxes in any of the upcoming fiscal negotiations. The loophole allows investors whose earned income is generated mainly from investments to pay taxes according to the capital gains rate, which is significantly lower than the top rate on earned income most of these individuals would otherwise pay.

A GOP House aide confirmed Friday that carried interest was the most likely place where Republicans would compromise on tax increases — both because it would put top Democrats in a bind and because they believe its impact on the economy would be minimal. Republicans have argued against similar tax increases in the past on the grounds that it would discourage work and investment and harm economic growth.