Santorum locks in Louisiana  —  NEW ORLEANS — Rick Santorum picked up another win on Saturday in Louisiana, but the victory won't significantly change the delegate advantage held by Mitt Romney in the GOP nominating contest.  —  The Associated Press called the race for Santorum within minutes …

Santorum wins Louisiana, next matchup Wisconsin  —  Rick Santorum won the Louisiana primary Saturday as project, solidify his support from conservative in the Deep South but still faces a tough next few weeks as he competes in Northern states where frontrunner Mitt Romney has done well.

Santorum's Louisiana win does little to change the game of delegate math  —  (CNN) — Rick Santorum's convincing win in Louisiana's GOP primary does little to change the delegate math that has rival Mitt Romney with a more than 2-to-1 lead, raising questions about whether he can generate broader appeal to win the nomination.

Santorum wins Louisiana primary  —  METAIRIE, La. — Rick Santorum won the Louisiana primary on Saturday, boosting his claim as the leader of the conservative wing of the Republican party even as his odds of beating Mitt Romney in the overall delegate race appear slim.

Trayvon Martin case: New Black Panthers offer $10,000 bounty for capture of George Zimmerman  —  Without a government-issued warrant, the organization opens itself up to civil or criminal liability, a lawyer said.  —  Mikhail Muhammad, center, leads a protest by the New Black Panther Party on Saturday …

Witness: Martin attacked Zimmerman  —  ORLANDO - A witness we haven't heard from before paints a much different picture than we've seen so far of what happened the night 17-year-old Trayvon Martin was shot and killed.  —  The night of that shooting, police say there was a witness who saw it all.

Dick Cheney undergoes heart transplant surgery  —  Washington (CNN) — Former Vice President Dick Cheney was recovering Saturday evening after undergoing heart transplant surgery, his office said.  —  Cheney, 71, had surgery at Inova Fairfax Hospital in Falls Church, Virginia.