If Barack Obama decides to run for president, we're going to hear a lot more about Antoin "Tony" Rezko, the senator's neighbor.

Rezko is the kind of neighbor you want—the absent kind—and he might be absent for a long time—in the federal pen. That move upriver might keep Obama from his own residential upgrade to that big white house he's got his eye on in Washington.

Read more at http://www.slate.com/id/2155501.