2. Clint Eastwood
Who could really amp up the crowds and achieve maximum effect from a surprise appearance? How about a Hollywood celebrity?
Guesses that Clint Eastwood might be the person to take the stage just before Senator Rubio only increased with a report from conservative political news site Townhall that the actor and director is en route to Tampa, Fla.
Mr. Eastwood is a vocal conservative who backed John McCain in 2008 and endorsed Mr. Romney earlier this month.