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The Associated Press reported that he ignored his political rivals, firing criticism instead at President Obama, whose approval ratings have dipped in recent weeks amid the uproar, largely from his potential GOP rivals, over the recent spike in gas prices.

Mr. Santorum held his election night party in Louisiana, which holds its primary on March 24. He also was scheduled to be in Puerto Rico on Wednesday and Thursday to campaign ahead of the primary on Sunday.

Mr. Gingrich campaigned Tuesday in Alabama, a clear indication of the state’s importance to his candidacy.