Photo by jsmjr When I was in Denver for the Democratic National Convention last August, I wondered if the anti-Coca-cola policies of the Pepsi Center wouldn’t lead the then-Obama campaign to alienate a large segment of the population: Coke drinkers. But with Pepsi’s latest ad campaign popping up all over Washington, in Metro stations, the sides of Metro buses, and even outside Union Station in advance of Obama’s inauguration on Tuesday, the tables have…