Caucus vs. Primary.

This question is for my father: What is the difference between a caucus and a primary?

Thank you in advance to all who reply:)

And thanks to the folks who answered in the past :wink:

Sorry about that. I could have done a more thorough search. But I usually just glance at the current threads on the board and assume that is enough. In the future I will try to be more careful. Thanks for the link though :slight_smile: . I will pass the information on to my father ASAP. And sorry again.