Per TDU, about 70,000 votes were cast in 2007. The contract passed by a margin of about 11,000.
TDU has identified the following locals not likely to vote "yes" on this contract, and their respective 2007 votes in favor of the contract:
89 (Louisville) 1664-760
396 (Los Angeles) 1255-678
623 (Philadelphia) 655-366
The contracted enjoyed its strongest support in the South (winning by more than 7,000 votes), West (winning by more than 5,000 votes) and upper Midwest (e.g. Milwaukee, Minneapolis; it enjoyed 80-90% margins in these communities). I doubt the margin will change much in the South -- strong conservative, RTW, low cost of living. It'll probably shrink in the West & Midwest.
Like I said earlier, we'll get more votes returned by PTers, and most will be overwhelmingly "no" (as others were in 2007). But I doubt there's enough "new" votes or persons switching votes to overcome the 11,000 margin.