By MICHAEL FALCONE NOTABLES --COULD MARTIN O???MALLEY BE THE CLINTON SLAYER? Former Maryland Gov. Martin O???Malley is expected to launch his 2016 White House bid tomorrow in Baltimore injecting another dose of competition into the Democratic nominating contest that heavily favors Hillary Clinton. No one denies the herculean effort -- and huge helping of luck -- it would take to stop, or even slow, the Clinton juggernaut, but O???Malley has a message that could resonate during a presidential cycle when so much talk is about dynasty.