Nonsense. The only reason such a statement is even marginally convincing is because there are so many people who throw up their hands and say "impeachment is a fantasy" because they fear the political cost, or because it requires too much perseverance.
By any reasonable standard, 0bama should be impeached, but if he isn't, maybe the People will just have to settle for total Republican control of both Houses of the Federal Legislature.
Do you honestly think that the current political oligarchy will impeach the second black President?