The D.C. streetcar initiative is in serious trouble. All of it. "I think it's fair to say that the entire streetcar program as was originally perhaps envisioned is possibly not going to happen," D.C. Councilwoman Mary Cheh, D-Ward 3, said Friday on WAMU's Politics Hour. Cheh chairs the council's transportation committee. On the streetcar, she said, the council and mayor are "in a state now of trying to reassess, and I don't think we've come to any firm conclusions." Considering the District's…