At ground level, Republicans win elections by doing one or more of five things:1) Get more Republicans to vote; 2) Get more people to become Republicans, and vote; 3) Get fewer Democrats to vote; 4) Get fewer people to be Democrats; 5) Get more votes from independents, i.e., people who are neither Republicans nor Democrats.There’s been a lot of talk about the “enthusiasm gap†in turnout between Republican and Democrat voters, about how the Democrats registered a lot of voters to vote in the “historic†2008 election who may not be likely to vote again, and about how the developments...