Raynham Democrats are holding a caucus Saturday to choose six delegates and three alternates for this year’s Democratic State Convention. The caucus, organized by the Democratic Town Committee, will be held at 10 a.m. at town hall. Any Raynham resident who was a registered Democrat as of Jan 31 is eligible to attend and to run for a delegate or alternate seat. The convention is scheduled for June 13 and 14 at the DCU Center in Worcester. Its primary business will be the endorsement of Democratic candidates in this year’s election for governor and other statewide offices. “We’d love to have a good turnout and we encourage people to come and participate,” said Joseph R. Pacheco, chairman of the Democratic Town Committee.