An Ordinary Person has a great post on an organizing effort for open primaries, with lots of background....
Why an effort for open primaries now?
Because: More than half the states holding presidential contests next month on Super Tuesday allow unaffiliated voters to participate, giving millions of independents a chance to shape what is usually an insider affair among Democratic and Republican loyalists.
Two of those states — California and New Jersey — together have nearly 6 million unaffiliated voters who will be allowed to cast ballots. Georgia, Illinois, Massachusetts and Alabama are among other prized catches with millions of independents eligible for the Feb. 5 contests. (Independents to Help Pick Nominees, by Ben Evans, AP)