President Obama sought Wednesday to reassure Democrats nervous about the impact of his health care law and the prospects for immigration legislation, telling them "You're on the right side of history." In the first of two closed-door meetings on Capitol Hill, Obama focused on financial gains as the economy emerges from the worst downturn since the Depression. He was warned about nominating former Treasury Secretary Larry Summers as chairman of the Federal Reserve and faced questions about his health care law. Some lawmakers complained that three years after its passage, the law still baffles many Americans. Rep. Ed Perlmutter, D-Colo.,...