"Barack Obama promised the most transparent administration ever. Barack Obama: You lie," Palin said.
"Way too many people believe Republicans are anti-immigrant, anti-woman, anti-science, anti-gay, anti-worker," Bush said.
"It's up to us to make sure that we learn from our mistakes — and my mistakes," he said.
Watch live video of the 2013 Conservative Political Action Conference here.
The NRA head hits Congressional Democrats for moving forward with bills on universal background checks and a federal gun registry.
The celebrity mogul opened the second day of the 2013 CPAC with a speech that combined dire predictions about the GOP's future with boasts about his own career.
The GOP leader spoke at the Conservative Political Action Conference.