You will hear people say that due to pollination, air pollution, or the intervention of the Alien Overlords (OK. I made that last one up. But people get a little extremist at times) there is no such thing as organic food any more.
Yes, any government official can be impeached - Presidents, Legislators & Judges, etc. But you can't impeach people for doing a bad job. Impeachment is necessarily dependent upon a charge of criminal or significant unethical behavior to warrant removal. Yes, Granholm is awful, but we're stuck with her for 4 more years.
But what happens if Obama is impeached and removed from office? Most educated Americans know that in the event the President is removed from office that the Vice President becomes the next the President. When Richard Nixon resigned, Vice President Gerald Ford became the 38th President. If Obama is removed from office, Joe Biden would become our 45th President. However, I bet if you went into the inner city areas of many of the larger metropolises you would find a number of people who have no idea who would take over if Obama was impeached.