With all the polls showing a possible Republican comeback this fall, President Barack Obama is trying to rally Democrat support. He addressed voter apathy as he tried to convince members of the Congressional Black Caucus to get their constituents to the polls.

"A lot of folks may be feeling like politics is something they get involved in every four years when there's a presidential election, but they don't see why they should bother the rest of the time," Obama said.

Obama said he brought "a change of the guard" to Washington, and now he needs his supporters to "guard the change."

He warned that Republicans seeking to gain control of Congress want "to do what's right politically, instead of what's right - period."

"I need everybody here to go back to your neighborhoods, and your workplaces, to your churches, and barbershops and beauty shops. Tell them we have more work to do."

Some political observers said there was another sign this weekend the president is getting concerned about the elections. He and his family went to St. John's Church in Washington, D.C. It was the first time they attended church since Easter.