Republican debate: 9 p.m., Fox news
MYRTLE BEACH -- The Republican presidential candidates will descend on South Carolina's largest tourism market today for a debate that could turn on the topic of immigration.
The subject is hot in this city, heavily dependent on seasonal and long-term workers to clean hotel rooms, cook in restaurants and build resorts for an estimated 14 million visitors a year.
Some of those workers are here illegally, business leaders acknowledge, adding they don't know the number.
But without them, the Myrtle Beach and S.C. economies could be in peril, they add.
Among the GOP candidates, the immigration debate has focused on building walls, patrolling borders and exploring ways to deport the country's estimated 12 million undocumented workers.
Business owners say the issue is more complicated. They say they support immigration reform, adding the local economy could be hurt if the federal government isn't careful.
The tourism- and travel-related sectors are Myrtle Beach's and South Carolina's largest industry. Together, they account for about $16 billion a year in revenue and employ nearly 11 percent of the state's population.
But immigration won't be the only issue discuss. Here's a snapshot of what each hopeful must do to claim victory in the debate:
Former New York City mayor
To score points: Giuliani must cast himself as an accomplished CEO and proven problem-solver, credentials others in the field lack.
He wants to avoid: Being pressed on his support of abortion rights and gay marriage, stances that put him at odds with many S.C. Republicans.
He can claim victory if: He convinces voters he is the candidate who can win in November and is best equipped to manage the war in Iraq and protect the United States from terrorists.
Former Arkansas governor
To score points: He must be likable, which apparently comes easy to this Southerner.
He wants to avoid: Appearing weak on foreign policy knowledge. Any slip-up reinforces the idea he doesn't understand those issues.
He can claim victory if: He manages to stand firm on social issues that make him appealing to conservatives while also convincing moderates he can govern right-of-center.
Arizona U.S. senator
To score points: McCain must make the debate about experience and his fitness to be an effective president immediately.
He wants to avoid: Having to explain his failed immigration plan, which critics said gave amnesty to illegal immigrants.
He can claim victory if: Post-debate pundits are still calling him the "comeback kid."
Texas U.S. representative
To score points: Paul must make his case for bringing the troops home without also condemning the troops.
He wants to avoid: Talking about being the only member of Congress to oppose giving civil rights icon Rosa Parks and Mother Teresa the Congressional Gold Medal.
He can claim victory if: He can define the discussion about Iraq and put the other candidates who support the war on the defensive.
Former Massachusetts governor
To score points: Romney must talk about his business experience, the economy and his vision of government reform that aims to keep taxes low while stabilizing entitlement spending.
He wants to avoid: Appearing as if he's given up on South Carolina. Pulling his TV ad dollars from the state looks like he has no intention of running hard here.
He can claim victory if: Post-debate pundits are talking about how likable Romney is.
Former Tennessee U.S. senator
To score points: Thompson has be Southern and conservative. Those are the two things that led supporters to draft him into the race.
He wants to avoid: Questions about whether he has the fire in his belly to compete for the presidency.
To claim victory: Thompson, an actor and attorney, must put in his best performance yet. He also must convince voters in South Carolina especially he has the mix of conservative credentials and mass appeal to beat a Democratic candidate in November.
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