In 2016, Donald Trump pulled out of the Conservative Political Action Conference (CPAC) at the last minute after having spoken there in previous years, delivering the nation’s largest gathering of conservative activists “about as strong a slap in the face as you can get,” in the words of a past American Conservative Union chairman.

This year, Trump is going to CPAC as the president of the United States. And his take on conservatism often differs from that which has dominated the Republican Party for nearly 40 years.