What should Obama do now?
Does he have to stoop to Clinton tactics to win?
According to David Bromwich on the Huffington Post, since Hillary==McCain (according to Hillary) and McCain==Bush (according to McCain), Obama needs to start campaigning against the three-for-one of Hillary/McCain/Bush.
Treat McCain as the opponent, and Clinton, with all politeness, as the ghost on McCain's threshold. If she dares to follow Obama into opposition again, let her try; but here Obama is the one with the "lifetime of experience."
Hillary Clinton's evident pleasure in the company of John McCain goes naturally with her reluctance to attack President Bush in any but the most general terms. This fact would be fairly brought to light if Obama now turned to make his case in detail against the Bush administration, with an informed judgment of the cost in destruction it has brought to America and to the world.