Sen. Ted Cruz, Rep. Tim Murphy and National health official Anthony Fauci among guests.
Blog Briefing Room
The president joined ESPN commentator Tony Kornheiser after a hectic week.
Poll shows 56 percent of people in the U.S. support the high court’s ruling.
Roughly 9,000 activists clashed with police as they moved to re-occupy the area Saturday.
Officer Darren Wilson told investigators he feared for his life before firing his gun.
Justices Sonia Sotomayor, Elena Kagan and Ruth Bader dissented to ruling.
Separate court rulings helped clear the way for gay marriages in the three states.
A spokesman said there is "no place for discrimination in the U.S. Armed Forces."
"I guarantee you we would not be worrying about Ebola right now," said the N.H. hopeful.
Castro fears that the state's new voter ID law could stifle minority voting turnout.