Mitt Romney is also the only Republican to beat Hillary Clinton in a hypothetical matchup.
Blog Briefing Room
Protests grew in New York City, D.C., Seattle, Minneapolis, Oakland and Cleveland.
He said "acts of violence threaten to drown out those who have legitimate voices."
Midway through Obama's remarks, protesters began criticizing his deportation policy.
After the ruling, the order was put on hold so the state can consider an appeal.
ABC's interview is Darren Wilson's first public remarks about the fatal shooting.
It is an increase over the approximately 700 on Monday night.
Mayor James Knowles said he asked the governor to deploy the troops earlier.
Police body cameras could ensure accountability in light of the shooting in Ferguson, Mo.
"Something is wrong with criminal justice in America," the senator wrote.