NYT:

Mr. Bush made it clear again on Monday that he would use the second veto of his tenure to kill the legislation, which would set a goal of having most American combat forces out of Iraq within six months of Oct. 1.

“An artificial timetable of withdrawal would say to an enemy, ‘Just wait them out,’ ” he said. “It would say to the Iraqis, ‘Don’t do hard things necessary to achieve our objectives,’ and it would be discouraging for our troops.”