Critical winner-take-all contest
-- Today (Tuesday); last polls close 8 p.m. est.
- 57 GOP delegates, winner-take-all.
-- Biggest prize so far of primaries and caucuses.
THE CANDIDATES/THEIR DELEGATES
-- Mitt Romney (59).
-- Mike Huckabee (40).
-- John McCain (36).
-- Rudy Giuliani (1).
-- Over one-third age 65 or older.
-- Survey found economy top issue for almost half of Republicans.
-- Terrorism, Iraq war, immigration also big issues.
-- Polls show McCain and Romney neck-and-neck in bitter battle.
-- Huckabee and Giuliani struggling to survive.
-- Candidates want momentum going into Super Tuesday February 5th.
-- February 5th.