Trump, Carson and Cruz still lead the pack in polls
READ MOREOfficers reported that Laquan McDonald was aggressive with knife; video shows him walking away
READ MOREPresident Obama appealed to Americans to come together as brothers and sisters
READ MOREDescendants of enslaved Americans will be able to trace their ancestry
READ MOREBlack Lives Matter protesters marched from City Hall ended up at the Police Officers Federation in northeast Minneapolis, Thursday, Dec. 3, 2015, to demand answers in the death of Jamar Clark. (Richard Tsong-Taatarii/Star Tribune via AP)
Police say protesters won't be allowed to set up similar encampments or block streets
READ MOREFBI agents search outside a home in connection to the shootings in San Bernardino, Thursday, Dec. 3, 2015, in Redlands, Calif.. A heavily armed man and woman opened fire Wednesday on a holiday banquet, killing multiple people and seriously wounding others in a precision assault, authorities said. Hours later, they died in a shootout with police. (AP Photo/Ringo H.W. Chiu)
Federal investigators Thursday were trying to learn why the couple left behind their 6-month-old daughter and went on the rampage
READ MOREWilliam Porter, one of six Baltimore city police officers charged in connection to the death of Freddie Gray, arrives at a courthouse for jury selection in his trial, Monday, Nov. 30, 2015, in Baltimore. Porter faces charges of manslaughter, assault, reckless endangerment and misconduct in office. (Rob Carr/Pool Photo via AP)
Prosecuter said William Porter could have saved Freddie Gray if he called for a medic
READ MOREWilliam Porter, one of six Baltimore city police officers charged in connection to the death of Freddie Gray, arrives at a courthouse for jury selection in his trial, Monday, Nov. 30, 2015, in Baltimore. Porter faces charges of manslaughter, assault, reckless endangerment and misconduct in office. (Rob Carr/Pool Photo via AP)
Jury selection for the first police officer to go to trial in Freddie Gray's death began Monday
READ MOREThousands pilgrimage to Paris for climate summit, but Congress keeps head in sand
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