How about a Warren/Brown ticket?

[Suburbia]

Good, excellent ticket. Sen. Sherrod Brown could play well in the Appalachian region, especially in KY, WV. Plays well in the Midwestern region and could seal the deal especially in Ohio and could play well in Eastern Iowa (Dubuque especially) with the working class votes. The ticket may be too progressive, but would be formidable. Republicans would attack this ticket a lot, though.