MANCHESTER, New Hampshire (CNN) - The National Right to Life Committee, which endorsed Fred Thompson in November, is sending out mailers in South Carolina urging "pro-lifers to unite" behind Thompson's candidacy.
The abortion mailer, which focuses on Thompson's Senate record, comes as his campaign is shoring up their South Carolina staff. The former Tennessee senator is hoping to make a comeback in a state where he's now slipped into a three-way tie for third place in most recent polls, behind Mike Huckabee and Mitt Romney.
"Vote for life in the South Carolina Republican Primary," the mailer says, noting that Thompson "is the only candidate endorsed by the National Right to Life PAC and South Carolina Citizens for Life PAC."
South Carolina Citizens for Life is the NRLC state affiliate that endorsed Thompson in December.
Thompson's campaign now hinges on the first-in-the-South Republican primary. Last week, Thompson was forced to deny reports he was planning to drop out of the race and support John McCain if he fared poorly in the Iowa caucuses voting. He finished third in Iowa and is running last in New Hampshire.
The Thompson campaign has begun to rotate staffers into the must-win state from their national headquarters in Virginia. This week, Thompson will avoid New Hampshire and head straight to the Palmetto State on Monday evening to prepare for a statewide bus tour and media push.
Thompson said on CNN's Late Edition Sunday that "it's all about South Carolina," and predicated his campaign will be resurgent if they win that primary on January 19.
He conceded the plan hinged on a fundraising boost to his cash-poor campaign.
"If we can raise the money sufficient to hold our own on television, we will win South Carolina and we will be in good shape," Thompson told Wolf Blitzer.
–CNN Political Producer Peter Hamby