Poll: Gingrich holds strong lead in Georgia; Santorum and Romney tied in Ohio

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The CNN/ORC poll shows a dead heat between a Republican candidate and President Obama in a general-election match-up in Georgia, with both taking 48 percent support.

In the same poll, a survey of likely Republican primary voters in Ohio confirms other polls released on Monday, showing a tie between Romney and Santorum. Both candidates take 32 percent, with Gingrich trailing at 14 percent and Paul at 11 percent.

In Ohio, Obama edges out the Republican candidate in a hypothetical match-up among registered voters, with Obama taking 49 percent and the unnamed Republican 45 percent.

Oklahoma, Alaska, Idaho, Massachusetts, North Dakota, Tennessee, Vermont and Virginia will also vote on Tuesday. 

Romney heads into Tuesday's votes after a string of five wins, but needs a strong performance to help solidify his status as the presumptive nominee.