With John McCain, Mike Huckabee and Mitt Romney all moving on after Super Tuesday, the next contests will be this Saturday in Louisiana, Washington State and Kansas.
With the strength he has shown in his home region tonight, Huckabee could parlay his strong Super Tuesday performance into Louisiana and Kansas. Washington would be a more natural fit for McCain, although Romney has been trying to pitch himself as a "western" candidate. (This Saturday’s contest in Washington is caucus, however, which probably won’t matter as much as the primary, which is 10 days later).
Then, next Tuesday, the race shifts to Maryland and Virginia. Romney and McCain are probably best-suited to compete in Maryland, while all three could be competitive in more conservative (and military-friendly) Virginia.