If Obama is re-elected, he simply has to veto any extension of the upper-bracket tax cuts. If it means all the tax cuts die, so be it. Why, you might wonder, would he be willing to do that then but not now? Well, hopefully the economy will be in better shape. (If it isn’t he probably won’t be re-elected anyway.) On top of that, canceling all the Bush tax cuts would have a real depressing effect on the economy, which in turn would also harm his re-election chances.
It's called strategy; and it beats the Krugman-Rich purism that is pure tactics.