President Barack Obama, seeking to fire up an important part of his support base ahead of November's elections, told black leaders on Saturday he wanted their support to "guard the change" he was delivering.
-- Aims to get out key vote that helped win White House
-- Polls show fewer thinking about voting in November
-- Low turnout could cost Democrats control of Congress
"I need everybody here to go back to your neighbourhoods, and your workplaces, to your churches, and barbershops, and beauty shops. Tell them we have more work to do. Tell them we can't wait to organise. Tell them that the time for action is now," he told the Congressional Black Caucus.
The words of America's first black president showed a deliberate effort to recapture the enthusiasm that had helped him win the White House in 2008, after polls showed African- Americans much less likely to vote than whites this year.
"It's not surprising that a lot of people may not be feeling that energised or that engaged right now," he told an annual awards ceremony hosted by the organisation representing black members of the US Congress.
"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," he said.
Republicans could make big gains in November as high unemployment and slowing growth turns voters away from Obama's Democrats, potentially costing them control of Congress.
A Gallup survey in early September found only 25 percent of blacks had given 'quite a lot' or 'some' thought to the Nov. 2 congressional ballot, compared to 42 percent of whites.
This represents a much larger gap than during the presidential election in 2008, when the two groups were about equal in their intention to cast a ballot.
High turnout in the African-American community, together with the enthusiastic support of young voters, was a striking feature of the 2008 election and an important part of Obama's strategy in securing the White House.
Success in repeating at least part of that performance in the upcoming midterm poll, when voter turnout is traditionally low, could make a big difference to congressional Democrats running in close races. All 435 seats in the US House of Representatives and 37 of 100 Senate seats are up for grabs.
"The last election was a changing of the guard - now we need to guard the change," Obama said.