I very much agree with this. It's certainly possible, but it depends on who the nominee ends up being.
He also has AR as a tossup, which is too conservative (should be Lean R), and NC as a tossup, which is also too soon. He is defining tossup widely.
Cook had Blanche Lincoln as a tossup into about October 2010 (and then only went so far as "Lean R").
Personally, I don't like the "tossup" label by any prognosticator, it's too wishy-washy. At least Sabato "calls" all races before election day.
Likelihood a given candidate will win and how much they win by aren't the same thing.
There's no contradiction in saying both candidates have a roughly even shot at winning a race and then one of the candidates winning by 14 points.
