When the sun rose over the Massachusetts Teachers Association headquarters yesterday, it was eerily quiet even though campaign workers for Democrat Martha Coakley were supposed to be manning a phone bank. Hours reportedly passed before anybody showed up for work despite the fact that the special election to fill Ted Kennedy’s old Senate seat was only hours away and Coakley was in a race to the finish with Republican Scott Brown. To be sure, a Sunday evening snowstorm made roads difficult to navigate Monday morning, but devoted campaign workers always find a way. Besides, the race was of such national importance that even President Obama flew to the Bay State on Sunday to stump for Coakley, sounding the classic leftist themes of class warfare and envy that White House political strategists are rehearsing for the 2010 midterm congressional elections.