The Maryland legislature was e-bombed by hundreds of MSI (Maryland Shall Issue) members all weekend, and continuously during today's session, to fight against the amended HB579. It went right up to the end of the session at midnight 4/9, and the bill was not brought to a final vote, killing it for this session.
There's an 80+ page thread giving a minute-by-minute discussion of the closing day of the session, which I found pretty exciting to read all at once; your mileage may vary. It's available on marylandshooters . com, under MD 2A Issues, if you really want to get into the sausage-making aspects of politics in Maryland, Cradle of Graft.