Advisor: Romney's shortlist could have 20 names

Former New Hampshire Gov. John Sununu, a Romney campaign adviser, said Ayotte is one of about 20 candidates under serious consideration to be Romney’s running mate. That’s according to New Hampshire Public Radio’s Josh Rogers, who reports on Romney’s meeting with Ayotte for NPR’s Morning Edition.

On Thursday, Romney is to campaign with another name on the list, Virginia Gov. Bob McDonnell, CNN reports.