Maryland Gov. Martin O'Malley, here with state Senate President Thomas V. Mike Miller Jr., supports raising the "flush tax" and making it more progressive. (T.J. Kirkpatrick/The Washington Times)

Maryland Gov. Martin O'Malley, here with state Senate President Thomas V. Mike Miller Jr., supports raising the "flush tax" and making it more progressive. (T.J. Kirkpatrick/The Washington Times)