When Ronald Reagan won the White House in 1980, the electorate was 88 percent white. Last year, only 72 percent of the voters casting ballots for president were white, and by 2016, that number will plunge again.This trend poses an enormous problem for Republicans. As Sen. Lindsey Graham of South Carolina said on NBC earlier this year, "we're in a demographic death spiral as a party."But instead of recognizing that demographic reality, instead of appealing to new voters, many Republicans are following a very different strategy: Stop them from voting.This strategy of exclusion has two elements.