Atlanta - Mitt Romney and Rick Santorum are virtually tied nationally in the race for the GOP presidential nomination, a CNN/ORC poll shows.
Santorum more than doubled his support since last month. Among Republicans and independents who lean toward the GOP, 34% say they back Santorum and 32% back Romney. The margin is well within the survey's sampling error.
The poll numbers indicate a split in the Republican Party that goes deeper than ideology, with signs of a gender gap and disagreement between white-collar and blue-collar voters.