Even if Romney wins and follows through on his promise to end ObamaCare, it may be a problem to get complete repeal through the Senate—the Republicans are not likely to have a filibuster-proof majority. Maybe they can identify the Senate Democrats coming up for re-election in 2014 who are the most vulnerable (ignoring the total ideologues like Harkin) to get to 60.
The problem I see with the Senate is McConnell. He loves crafting complicated beltway deals and won’t make any attempt to just steam roll the Rats.