This Saturday, across the state, Democrats will caucus.  Every two years, the party holds a caucus, and every four is a presidential caucus.  A presidential caucus might seem irrelevant as President Barack Obama will be the party nominee, but the state party says the caucus is still important.  Idaho Democratic Party Interim Executive Director Sally Boynton Brown says in 2008, 20,000 Democrats statewide showed up to caucus.  Officials say choosing smaller venues comes because they know turnout will be lower.  They say it will be the "party faithful" who will show up.  There will be 34 caucuses statewide, as some counties are doubling or tripling up.  Each caucus will be a bit different in terms of events and how votes will be cast.  All will begin this Saturday,  at 10 a.m. and officials say to get there early.  In order to caucus, you cannot have participated in the Republican caucus.  While participants don't have to officially register for the party, they will be asked to pledge as a Democrat.