Sanders accuses Clinton of rewriting history on DOMA
Republicans need to pick up six seats to claim majority
One expert says HRC's goal 'completely unrealistic'
Virginia senator calls marriage equality 'the fair and right thing to do'
Examining social, political and legal implications of announcement
Volunteers ready to staff phone banks, boost turnout for Tuesday vote
State LGBT group hopes to bring issue before voters
But lesbian lawmaker likely faces stiff challenge in general election
LGBT advocates push lesbian lawmaker to run
Gay nuptials legal in both early voting states