The field of Republican presidential candidates is dwindling. A debate Thursday night in Boca Raton is their last encounter before Tuesday's pivotal Florida primary.
The candidate with the most at stake is former New York City Mayor Rudolph Giuliani, whose strategy from the start has been to put all his eggs in the Sunshine State basket.
But polls show him slipping in Florida, and a loss there would place his viability at risk — if not end his candidacy altogether.
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