PALM BEACH, Fla. — In perhaps his most campaign-style speech so far, not-yet-official GOP presidential candidate Jeb Bush vowed Thursday not to alter his views on immigration despite intense opposition among some parts of the Republican base.

“If I go beyond the consideration of running, I’m not backing down from something that is a core belief,” Bush told a gathering of the conservative Club for Growth in Florida. “Are we supposed to just cower because at the moment people are all upset about something? No way, no how.”