Sen. Marco Rubio  talks with business leaders  Aug. 12 at the Commerce Building in Gainesville, Fla. (Brad McClenny/The Gainesville Sun via AP)

ORLANDO — Long a rising star among conservative activists, Sen. Marco Rubio (R-Fl.) came face-to-face today with the fallout from his role in helping craft a bipartisan Senate compromise to overhaul the nation’s immigration system.

Speaking Friday at the opening session of the “Defending the American Dream Summit” sponsored by the Americans for Prosperity Foundation, the senator was interrupted repeatedly by calls of “No amnesty!” from attendees scattered throughout the 1,000-person audience.