Obama has "walked the walk" of bipartisan co-operation, too, back to the beginning of is career as an elected representative up to his time in the Senate. There are plenty of examples that google will bring up if anyone really wants the facts.

If you google "Republicans who worked with Obama", one of the most interesting sites is this one:

Republicans for Obama

"...Collectively, we have campaigned, worked for, and voted Republican all our lives, but recognize that our Country needs a new kind of leader at this time. While there will always be important issues on which thoughtful Americans will disagree, there are others that cannot be up for debate— our economic prosperity and our standing in the world.

Senator Obama has rejected the politics of division and the win-at-all-costs attitude that has hurt our ability to move forward as a nation. While we as Republicans will not always see eye to eye with a President Obama, we know that his politics of competency and unity will lead to a stronger America."