Senator Russ Feingold says he will try to use Congress' control over the purse strings to end American involvement in the war in Iraq.
The Wisconsin Democrat made his comments at a Senate Foreign Relations Committee hearing today.
Feingold says he has been asking for a withdrawal of troops, but that hasn't happened.
So now he says he will work with other members of Congress to develop a plan for cutting off money for the war. But he also says he will make sure the plan will not put US troops in jeopardy.
He says one possibility is to set a date for cutting off funding for the war.
In response, a White House spokesman says that President Bush's plan for Iraq offers a new way forward. Bush said last night that he's sending more than 20,000 additional troops to Iraq.