John McCain:

“I have tried to discourage my Republican colleagues from saying that September is some kind of seminal moment” for judging Bush’s escalation. A recent National Journal poll found that 67 percent of congressional Republicans say that even if conditions in Iraq have not improved significantly by September, Congress will still not pass legislation withdrawing U.S. forces out of Iraq.

UPDATE: Not everyone is listening to McCain.

Sen. Jeff Sessions (R-Ala.), a loyal supporter of President Bush, indicated Sunday that Republicans will be ready by September to look at bipartisan efforts to draw down the troops that were part of the surge to help secure Baghdad. […]

The senator added that, when General David Petraeus is reporting back on the progress of the surge in September, “I think most of the people in Congress believe, unless something extraordinary occurs, that we should be on a move to draw those surge numbers down.”