Election Day is only a month away, but for our money the Presidential campaign really began in earnest Wednesday night in Denver at the first Presidential debate. Mitt Romney met the challenge of appearing Presidential, showed a superior command of fact and argument than the incumbent, and made a confident, optimistic case for change. These columns have often criticized the former Massachusetts Governor, but this was easily his finest performance as a candidate, and the best debate effort by a Republican nominee since Ronald Reagan in 1980.

Mr....