John McCain is portraying Barack Obama as the product of Chicago's corrupt political machine in a new TV ad that showcases Illinois' scandalous side. In the 30-second ad, voters are introduced to Gov. Rod Blagojevich's "legacy of state and federal investigations," Senate President Emil Jones Jr.'s "ethical cloud," William Daley as a "lobbyist" and "money man" Tony Rezko as an Obama's "patron" turned "convicted felon." Rezko was a major force in the early days of Obama's career and he helped him buy his Hyde Park mansion a few years ago. Rezko was convicted this year as the architect of a...