Interesting question, pretending that the house would have let it stand.
We would have been in Iraq much sooner and may have pulled the troops from Iraq 1 out of Saud and did more with the Turks to get to the North of Iraq in a tighter circle.
With the troops out of Saud 9/11 may not have happened. He would have lost the second term because of dissatisfaction with the war.
The housing bubble wouldn't have taken off because the economy would have been so moribound that derivatives never took off.
Tea Party wouldnt have happened because regular folks would have gotten to vote for the regular republicans.
With Mccain running with Jeb Bush as VP because he wasn't desperate for the right wing and being a few years younger might have replaced him.
The dems would retake the house and the senate would be 51/49
The young Senator from Indiana would be a regular guelfing partner with Rep Boehner as they became the voice of reason in any bipartisan solutions.
May have been a lot better