Fresh from a confident debate performance, former Massachusetts Gov. Mitt Romney was jaunty as he campaigned at the Hispanic Leadership Network's lunch in Miami on Friday. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Florida Sen. Marco Rubio speaks at the Ronald Reagan Presidential Library in Simi Valley, Calif. in August. Rubio's dispute with Univision has provoked a boycott of the network's presidential debate.

Jae C. Hong/AP hide caption

itoggle caption Jae C. Hong/AP