As you look at this graph produced by Steve Sailer, keep in mind that, with a few exceptions, America was founded by married white Protestants of English extraction. Then recall that there is not a single white Protestant on the Supreme Court and neither party saw fit to nominate one for President. And then recall that demographics is destiny.
Some on the right claim that it would be a mistake to engage in the same racial politics that have created a left-wing majority. That is like trying to play football without acknowledging the newfangled rule that permits the forward pass. Racial politics are now the rule, and the only way the right can win is to start playing the game and taking advantage of its numerical advantages while it still can. The conventional abstract appeals to “freedom” and “America as an ideal” so beloved by conservative Republicans are the political equivalent of “three yards and a cloud of dust”.