How was Romney going to swing what ended up being a 7 point difference? That is 3 points higher than the overall popular vote.
But they still won it, in years with very close elections a Republican actually won (well, sort of).
Easy, depress turnout and increase his share among white voters and minorities. Its really simple guys for a Republican to win. Its not hard to swing 3-6 ponts in national election. The popular vote means nothing and the EC means everything. Romney only needed to swing about 150,000-200,000 votes on average in all the states he lost to swing it his way.