Why not elect Romney in a landslide so he has a mandate....a mandate of repealing Obamacare in the republican platform....and push for conservatives down ballot...then we have congress pushing for repeal of Obamacare and if and when Romney pushes back against us we start our search for a Palin to run against him in a 2016 primary as a true conservative? Then the true conservative that beats Romney has a conservative congress in place to fight the good fight.
We could "win" a landslide by nominating Lincoln Chaffee who is about as "Republican" as Romney and governs just as conservatively (not at all), or, imagine the landslide if we nominated Her Imperial Hillaryness. Now, it is true that either of those two would push back against any vestigial and limp attempts at, well, Republicanism, but the truckload of spineless wimps infesting the GOP caucuses of BOTH houses of Congress can hardly be depended upon to do actually "Republican" things and they certainly cannot be described as a "conservative Congress" awaiting the 2016 election of an actually conservative POTUS, whose election they would more certainly resist to the last drop of their collective blood. A conservative POTUS would mean the ability to veto spending bills and, if the "pragmatic GOP members of Congress and the Senate cannot line their pockets, their grandchildren's trust funds and their political contributors' pockets with you money and mine, then just what was the point of being elected?
That is why not to elect Robamney at all much less by a landslide. His election would cause each and every corrupt person and institution in the land to be joyously speaking in tongues.