The Invisible Primary, 3/10

Tracking the GOP race to 2012

Rick Santorum wooed Christian conservatives in Iowa in a speech to the Iowa Christian Alliance; and he used almost his entire speech to respond to robocalls in Iowa calling him a secret pro-choicer; Mitt Romney will speak at Ashland University in Ohio April 30; Tim Pawlenty will speak to the North Dakota Republican Party convention on March 21; Pawlenty says he doesn't know if he'll endorse Charlie Crist or Marco Rubio in Florida; and Sarah Palin will speak to a faith-based drug and alcohol rehab clinic in Missoula, Montana Sept. 12.