Tight Primaries Suggest Less-Predictable South.

HUNTSVILLE, Ala. -- They stood beneath a Saturn V rocket, baby-carrying mothers, cross-armed men, workers in coveralls and financial planners, listening as Rick Santorum told them who they were and why they mattered. ''Red Alabama,'' he said to the crowd on Thursday at the U.S. Space and Rocket Center here in Huntsville. ''Conservative Alabama. The heart of conservatism.'' [ABSTRACT FROM PUBLISHER]