No way. You are dreaming.
The Repubs may have a slight majority in the Senate in 2012. But a "slight majority" means the Democrats can filibuster. And they would.
Naaah--the Republicans will get back the fillibuster in 2010, and maybe get nominal control of the chamber. Of the 33 Senate seats up for grabs in 2012, do you know how many of those are currently held by Dems?
24 of them. If the Republicans get within three of the Dems in 2010--53-47, say--with a tremendously unpopular Democratic president (as Obama will be by then), the Dems would be in for a
severe ass-kicking. It may not be 68, or even 65, but it will probably be over 61. And that would be enough.