According to exit polls, whites swung heavily towards Romney. It was in fact the only statewide race in CO this decade in which the Republican won the white female vote, which went solidly for Romney 53/46. I remember reading here on Atlas that college educated whites carried Obama to victory in CO in 2008, but Hispanics in 2012.
CO, NV & VA would have been the first states to flip to Romney based on improved performance among Latinos alone, and all of them would have flipped at roughly the same point (i.e. if Romney had won around 45% of the national Latino vote). Ultimately, Romney won 27% nationally and 23% in CO.
The only state in 2012 where Latinos made any difference in the EV outcome (within the parameters of possible Latino turnout & support) was FL - and even there, it was mostly due to a quirk in Cuban voting patterns. One of the biggest misconceptions about the overall outcome of the 2012 presidential election is that Latinos had any influence on it.
