Yes, it would have been, because the electorate is such that Texas would never (in its current state) vote for a Democrat, and Massachusetts would never vote for a Republican, at least at the Presidential level. The "blue wall" and the "red wall" are nearly impenetrable provided each candidate has a brain. If you measure landslides by Reagan's standards, then there will never be a landslide again. But a 325 Romney win would have meant eating significant margins into traditionally blue territory. And that, frankly, is what a landslide is all about: eating into the opponent's territory. Like Obama with Colorado and New Mexico and Virginia.