It seemed like the afterthought in the payroll tax cut extension fight, a small consolation prize to the Republicans on what should have been the easiest of bi-partisan votes. But the two-month clock is now ticking on whether Obama will approve the Keystone XL pipeline from Canada’s environmentally disastrous tar sands. If we want him to make the right decision and deny the permit, maybe it’s time to Occupy Exxon, with creative protests at local Exxon/Mobil stations. Of course we need to keep pressuring Obama. The bill’s deadline precludes anything close to the kind of comprehensive environmental review that he called for after rallies and civil disobedience at the White House led him to delay approval for a year. But why not also go after the oil companies whose influence led the Republicans to hold the rest of the unemployment and payroll tax bill hostage to the fast-track requirement. Exxon/Mobil has long been the dirtiest of the dirty among these companies. This makes them a logical target.