BREAKING: Santorum to suspend campaign

Republican presidential candidate Rick Santorum will announce he will suspend his campaign on Tuesday at an event in Gettysburg, Pennsylvania, a senior adviser to the campaign told CNN.

A second source told CNN that Santorum, his wife, and campaign manager held a conference call with staff Tuesday, advising them not to grow discouraged.

"We are going to stay involved and stay active in the next couple of months," Santorum said, according to the source.
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GOP presidential candidate Rick Santorum said Tuesday he is suspending his campaign.

He made the announcement at the Gettysburg Hotel in Gettysburg, Pa., talking about his young daughter's illness and reflecting on the campaign.

His 3-year-old daughter Bella was taken to a Virginia hospital Friday with pneumonia. Santorum, a former Pennsylvania senator, left the campaign trail until this afternoon. The child has a life-threatening genetic disorder known as Trisomy 18.

"She's a fighter," said Santorum, standing beside his wife and children. "She's doing exceptionally well."

Santorum also faces an uphill battle against front-runner Mitt Romney in the race for the Republican presidential nomination. Five states, including Santorum's home state of Pennsylvania, hold primaries April 24.

Romney is spending $2.9 million in TV ads in Pennsylvania. Romney is far ahead of Santorum in the race for delegates to the Republican National Convention and is the party's likely nominee.