Start with a big ballroom at a resort hotel just outside D.C. Add thousands of conservative activists. Stir in hundreds of political journalists, and you've got an irresistible attraction for any Republican presidential hopeful.
For those with their eye on the Oval Office, it's also an early audition before a key audience.
It's the annual Conservative Political Action Conference — CPAC for short — where there's always talk of the next presidential election. This year as many as 10 possible 2016 candidates were invited to speak during the three-day event.