Austin, Texas (CNN) - Mitt Romney has campaigned across Mississippi with Gov. Phil Bryant at his side, but he won't have similar support once the Republican race veers into a neighboring state.
Louisiana Gov. Bobby Jindal will not endorse a candidate ahead of the state's March 24 primary, a source close to the governor told CNN.
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Jindal, certain to be short-listed by the Republican nominee as a potential running mate, endorsed Texas Gov. Rick Perry last fall and campaigned aggressively on his behalf before Perry ended his campaign in January.
Rick Santorum is planning a rally in Lafayette on Tuesday, but Louisiana has largely escaped attention so far in the presidential race.
The primary is only the first step in the state's complex delegate allocation process. The Louisiana GOP will also hold caucuses in April and a state convention in June to determine where the state's 43 delegates will go.
Illinois, with 66 delegates at stake on March 20, looms as a more pressing contest for the candidates.