WASHINGTON (AP) - President Barack Obama has told lawmakers he's confident they can act together to make a difference for the country's children, "and our children's children." At a luncheon at the Capitol hosted by congressional leaders after his inauguration, Obama said he recognized that democracy isn't always easy and there are profound differences among those present. But he said all present were serving because they believed they could make America better. He said lawmakers should be mindful that individually they cannot move the country forward, only with their partners in government. Vice President Joe Biden also spoke at the lavish lunch in Statuary Hall, saying he was proud to serve as Obama's vice president. He said the bipartisan luncheon showed the ability to work together and find "a sense of opportunity." About 200 guests joined the Obamas for the luncheon, which has taken place in its current form since 1953.