The JacksonChannel.com reports: Tuesday's Deep South primaries could answer questions for all three Republican presidential candidates.
Polls are open in Mississippi and Alabama as Mitt Romney tries to make a southern breakthrough. At the same time, Newt Gingrich is seen as needing wins to stay in the race while Rick Santorum looks for a knock-out blow against Gingrich. Santorum wants to go one-on-one with Romney.
Related story: First Thoughts – Why Romney could lose (and also win)
Read more political coverage @ NBC Politics