So, here’s a question: Obama is up by 6 in Michigan according to the RCP average yet he’s campaigning in Detroit a month before the election, why?

Barack Obama was to move his campaign to the industrial Midwest Sunday as the Democratic nominee and his Republican rival, John McCain, tore into one another over the reeling US economy.
Obama was to speak at a rally in Detroit one day after the US Senate approved 25 billion dollars in loan guarantees for the financially strapped US auto industry.

Why isn’t he spending his time trying to flip Florida, Virginia and North Carolina? Does he think he has those states already? Or does his internal polling tell him more about what’s going on in Michigan than we are seeing in the RCP average?