[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/POLITICS/02/27/iraq.dems/art.pelosi.gi.jpg caption="House Speaker Nancy Pelosi has questioned the need to keep 50,000 troops in Iraq until 2011."]
WASHINGTON (CNN) - Top Democrats have expressed concerned over President Obama's plan to draw down nearly two-thirds of U.S. forces in Iraq by August 2010, while some key Republicans are offering praise.
At issue: Obama plans to leave between 35,000 to 50,000 residual forces in the war-torn country, serving in a training or advisory role to the Iraqi military.
All U.S. troops have to be out of Iraq by December 31, 2011, under an agreement the Bush administration signed with the Iraqi government last year. There are currently 142,000 U.S. troops in Iraq.
House Speaker Nancy Pelosi, D-California, recently cited concern that the residual force Obama is planning to leave in Iraq is too large.