Well, every 4 years, the voting power of the White Male goes down about ~3%. At the same time, white women are waking up to the fact that the Republican Party is poison for them. Between that, and the forty year long embrace by the GOP of bigotry, I don't think there's any chance that Hispanics, women, or any other group is suddenly going to switch to voting for the GOP. The Republicans are facing a disease of attrition, where people are leaving the party, and no one new is coming in. Add to that the fact that most of the GOP's voters are over the age of 45, and the baby boomers are starting to reach the age where age related dementia starts to take hold, I don't think they've got much longer to be a viable force in US politics, unless they undergo massive changes to be inclusive of others. The only real question, is how fast will this disease of attrition have a profound result? Will it be four years, or twenty? Probably somewhere in between, but it's coming. It's almost Darwinian. You could call it Social Darwinism in action.