Mayor Marion Barry, the mayor of Washington, D.C., had just taken a long drag from a crack pipe when the FBI burst in and slapped on the handcuffs, ending his hopes of having sex with the woman who had invited him to the hotel room in the first place back in 1990. “Bitch set me up!” he said as they dragged him away. Call it the Menendez defense. With his trial set to begin next month, freshly revealed court documents confirm what legal observers predicted months ago when Menendez and his wife, Nadine, hired separate legal teams. He’s apparently going to blame his wife. And when her trial comes…