Sen. Marco Rubio, R-Fla., delivers a speech during the annual Conservative Political Action Conference in February in Washington. Win McNamee/Getty Images hide caption

itoggle caption Win McNamee/Getty Images

Sen. Mitch McConnell doubts President Obama will adopt Republican views so the GOP must keep the president from being re-elected, he said.  Manuel Balce Ceneta/AP Photo hide caption

itoggle caption Manuel Balce Ceneta/AP Photo