President Barack Obama's top economic adviser said Sunday that "there's no more important issue facing the country than job growth," but it will take time to see the recession recovery that's expected.

National Economic Council Director Lawrence Summers, appearing on CNN's "State of the Union," said that there were signs of progress in economic recovery and putting people back to work.

"A year ago the question is would we have a depression; today everyone agrees the recession is over," Summers said.

But rebounding from high jobless rates remained key, Summers said. "If unemployment stays high we're not going to have the strength in the world we want," he said.

"Even with the improvement it's still a critical juncture for our country," Summers said.

Still, Summers stressed that Obama's measures thus far have been successful. "I don't think there's any question that the Recovery Act is serving its intended function," he said.