Trump makes large inroads with the white working class, but still loses due to a surge in Latino turnout, high black turnout, and the loss of Middle Class White Suburbanites, many of whom vote for Romney. Hillary wins a bunch of states with pluralities because of this.
Clinton 50% - 440 EVs
Trump 39% - 88 EVs
Romney 10% - 10 EVs
Other 1%
Oh, and also, Romney doesn't have a chance of actually winning Wyoming (12% Mormon - only Lincoln County is majority Mormon) or Colorado (2% Mormon). Romney obviously gets a large number of non-Mormon votes in this scenario, but not enough to win either of those states. Wyoming in particular doesn't have many of the type of Republicans who would back him over Trump.