By Amanda Terkel
ORLANDO, Fla. -- Former House Speaker Newt Gingrich doubled down on his admiration for Sen. Marco Rubio (R-Fla.), telling an enthusiastic crowd at his final rally on Monday that he was eyeing him as a potential running mate if he wins the GOP nomination for president.
More: Newt Gingrich: Marco Rubio Looks 'Awfully Good' For Vice President