So who's your guy/gal/it? Or are you just a bomb thrower?
Actually, 22nd Amendment aside, if Obama would verifiably promise (ahem) to force Congress to work within its constitutional Article I, Section 8-limited powers, then Obama could have the job for life for all I care. After all, the only intrastate taxing and spending program that the feds would have is mail delivery evidence by Clause 7 of Section 8. And I can see Obama helping to deliver mail with his golf cart.
Otherwise, I think that most "conservative" candidate possibilites that I am aware of seem to want to go to DC and exercise constitutionally nonexistent federal government powers as much as the Democrats do. Sarah Palin might be an exception.
In fact, with all due respect to the family and supporters of the late President Reagan, even he wrongly signed bills that Congress had no Section 8 authority to make. So conservative does not necessarily mean pro-constitutionally limited power federal government.