Rick Santorum Speaks In Gettysburg, Pa. (LIVE VIDEO)

04/10/2012 01:52 pm ET

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Republican presidential candidate Rick Santorum is holding a news conference in Gettysburg, Pa.

Watch live video of the event above, via MSNBC.

Santorum 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. But in deference to Bella's illness, Romney's campaign pulled down a harsh ad that was running against the former Pennsylvania senator there. Romney spokeswoman Andrea Saul said Monday the campaign asked TV stations over the weekend to pull the ad and replace it with a positive, pro-Romney spot.

Romney is far ahead of Santorum in the race for delegates to the Republican National Convention and is the party's likely nominee. Santorum has said he won't drop out of the race, though he has acknowledged he will have to win Pennsylvania if his campaign is to survive.

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