In the wake of Mitt Romney’s loss, many Republicans say the GOP must make far-reaching changes to be competitive in future elections. White voters are a smaller and smaller part of the electorate, they point out, while Latinos and other minorities are growing as a percentage of the voting public. Unless the Republican Party reinvents itself to appeal to those voters, the argument goes, the GOP can get used to being out of power. There’s something to that. The electorate is changing, and the Republican Party needs to keep up with the times. But the more fundamental answer to the …