Federal judicial panel rules that challenge to Maryland’s awkward congressional map should move forward; Japan pledges $2 million to fund studies into feasibility of DC-Baltimore maglev train; lawmakers challenge state Medicaid limiting access to drug used to treat opioid addiction; report on Baltimore Police using surveillance plane stuns privacy advocates; Baltimore Police say action wasn’t a secret; but charity handling pass-through funds says it had no idea; lawmakers question Caret’s $75,000 bonus; and two delegates rising to replace Sen. Raskin.