WASHINGTON (CNN) -- House Speaker Nancy Pelosi plans to be "blunt but polite" with President Bush when she and other recent visitors to Iraq and Afghanistan meet today at the White House, a senior Democratic aide told CNN.

The aide also notes Rep. John Murtha, D-Pennsylvania, who frequently sparred with the Bush administration over Iraq during the past year, plans to attend this White House meeting since he was among those in Pelosi's delegation.

This comes a day after news surfaced that the president and Democratic congressional leaders agreed to form a "bipartisan working group" on Iraq and the broader war on terror.

In a letter to Bush dated Tuesday, Pelosi and Senate Majority Leader Harry Reid argue for increased dialogue between the two branches of government, proposing the president meet regularly with the congressional leadership.

"Clearly, we need more bipartisan cooperation and a more regular dialogue between the legislative and executive branches, both in formal sessions through the committee structures and through less formal means on these critical national security challenges," the Democratic leaders wrote.