''
That doesn't magically make them irrelevant, and it doesn't decrease their power. I see no reason to believe gerrymandering is going away. If anything, it's increased in effectiveness.
I don't really know what this is based on, other than wishful thinking. I suppose you could point to demographics, but previous evidence suggests that Obama's an outlier when it comes to receiving this degree of the Asian vote, and Latinos likely voted heavily against Romney on a one-issue (immigration) vote. Ultimately, candidates matter much more than characteristics of the electorate; Obama was a good candidate and both McCain and Romney were historically weak.