<span>This is known as a precinct convention. Attendance is open to anyone who voted in the party primary. Attendees may elect delegates for the district or county convention. They may also vote in adopting resolutions that will be forwarded along to those district or county conventions.</span>
The veto power of the president under the U.S. Constitution best reflects the principle of "checks and balances," or a "balance of power," since this stops the Congress from becoming too powerful.
i would assume that it would be a open primary
open primary- a primary election in which voters are not required to declare party affiliation