What is the difference between a primary and a caucus?

A Primary is when people use voting machines to vote. A Caucus is more complicated. People gather in rooms and are divided up by whom they support. If there’s not at least 15% support for a particular candidate, those voters have the option of throwing their support to any of the other candidates.

Go to google.com and look it up. Because it will take long to explain and your get a better explaination..

a primary is an open vote for republicans and democratics alike. A caucus is only for either registered democrats or registered republicans