It's no surprise that the financial reform bill passed today, but it is interesting that 19 of the senators from the 10 wealthiest states voted "Yea" on a bill intended to impose 533 new rules on the financial services industry.

It's a complicated topic, which is why the Main Street vs. Wall Street rhetoric might be the most overused and ham-handed Luntz-ism of this election cycle. But the fact is that wealthy constituencies generally benefit from fewer financial regulations.

In 1976, those constituencies were voting Republican. By 1984, Barone wrote that "the sense of deprivation" that glued together the New Deal Democratic coalition and "the sense of privilege" that kept some voters Republican "have tended to fade."

By 2004, as this Washington Post map shows, eight of the 10 wealthiest states voted Democratic, and in 2008, all of them went blue. It's a well-reported generational shift in American politics, but still a fascinating backdrop to today's vote.

Wealthiest States