He was going to bring us all together; there was no black America, no white America. How things have changed:

In the video message to his supporters, Obama said his administration's success depends on the outcome of this fall's elections and warned that if Republicans regain control of Congress, they could "undo all that we have accomplished."

"This year, the stakes are higher than ever," he said, according to a transcript of his remarks provided by Democratic officials. "It will be up to each of you to make sure that young people, African Americans, Latinos and women who powered our victory in 2008 stand together once again.