According to this story, Virginia State Senators Richard Obenshain (R-Harrisonburg) and John Cosgrove (R-Chesapeake) plan to introduce bills this year to let parties close their primaries. The Obenshain proposal would also change the voter registration form, so that the form would ask applicants to choose a party, or independent status. The bills don’t appear to have been introduced yet. Thanks to Mike Drucker for the link.