Suddenly, our open senator is acting like a dissembling pol Barack Obama tells us he is the messenger of a new kind of politics. Open. Transparent. Different. But put the pedal to the metal and ask Illinois' junior senator new and serious questions about his radioactive, federally indicted, former friend Antoin "Tony" Rezko, and suddenly this gleaming presidential hopeful and paragon of new politics behaves just like any other dissembling, dismissive Chicago pol, ducking the discussion while pretending not to. The story behind the story of this week's Sun-Times' reports on Rezko, the power broker slumlord, and Obama, voice for...