Undoing the work of the Obama administration has been a central tenet of Mitt Romney’s presidential campaign. Indeed, at times it has felt as if the Republican candidate has been as committed to turning the clock backward as he is in pushing ahead with his own policy initiatives.

But should Romney capture the White House next month, he’ll likely wrestle with the same impediment that has made the last two years of President Barack Obama’s term so difficult: a divided, intransigent Congress that has little appetite for large-scale legislating. Even if, along with a Romney victory, the GOP snares control of the Senate, it won’t be by enough of a margin to ward off Democratic filibusters.