Heather Mizeur among those who testified
Unique showdown for Md. Senate seat
Rich Madaleno introduced bill
Says lieutenant guv should make measure an administrative priority
Session begins amid gubernatorial campaign
Heather Mizeur describes endorsement as a "puzzling choice"
Equality Maryland Executive Director Carrie Evans testified in support
Activist praises nat'l group's role in victory
LGBT leaders contend much work remains despite triumphs
Advocates condemned action striking down parts of Voting Rights Act from previous day