What would the 2012 results have looked like if Democrats won 59% of whites?

[AGA]

According to 538's swing-o-matic, if Obama got 59% of whites and all else stayed the same, it would look like this.

Utah, Wyoming, and NE-03 are quite close.

Obama wins the PV 65-33.

[AGA]

Why would it be those interior Western states that would hold out the most? And what would the county-level vote for Democrats look like? Would they actually take the majority of the nation's counties, and not just be confined to metropolitan areas, suburbs, minority counties, etc?

In this scenario, Republicans would lose every racial demographic, but whites would still be their best demographic, meaning that they would do best in very white states. Whites don't vote the same way all across the country as they are very liberal in New England and the Pacific Northwest while very conservative in the South and Inland West. Republicans would still be able to win the state of Utah because it is both very white, and whites in that state vote more Republican than they do nationwide.

In this landslide victory, Democrats would definitely win the vast majority of counties because they get 66% of the popular vote. In 1964, Johnson got a bit over 60% of the popular vote and won the vast majority of counties as a Democrat. Of course, they would win by greater margins in urban areas.

[AGA]

So would Democrats then obtain very high percentages in the states of the Northeast? How strong would they be in D.C.? And in which states would Republicans be the strongest? In other words, which states would be the close states of this election?

Both the map posted by me and the one posted by MLM do a good job of showing where Democrats would be strongest. The dark red states are the most Democratic ones, and the shading is in increments of 10%. Democrats would be very strong in the Northeast as they would obtain over 70% of the vote there.

In DC, Democrats would obtain 92% of the vote in DC according to 538's swing-o-matic. While this would be their strongest state/district, that number barely any higher than the 91% obtained by Obama in 2012. This is because whites in DC already vote more than 80% for Democrats so there is not much room to make gains there.

Since this is a Democratic landslide, only the most Republican states would be close. Utah, Romney's best state in 2012, would be won by the Republicans by only around 2 points. Wyoming, Romney's second best state, would actually be won by the Democrats by around 3 points.

[AGA]

Uh, what would Romney's results look like if you just magically added 20% to each of his minority totals?

From 538:

Romney: 312
Obama: 226

Romney wins the PV 53-45.3.