More than 67 million Americans watched the first of this year’s three debates. According to public-opinion polls, only about 17% of eligible voters have not yet made up their minds about which candidate to support. That is surprising, given the widening political gap between America’s two main political parties. In private, Obama and Romney may be able to agree on many things. But the Republican Party has moved far to the right of Obama’s moderate liberalism, and Romney has been pulled along with it.