[Reagan Man]

Although it is true that originally a neo-conservative was a person on the left who switched to the conservative side on certain issues, the term now refers to anyone who shares such views whether or not they were ever on the left earlier in their life.

Wrong.

A neo-con is a former liberal espousing political conservatism. The definition hasn't changed for the last fifty years.

[Korth]

You are completely wrong. There are now many neo-cons who never were on the left. Michael Barone and Paul Gigot are two examples of well known neo-cons who have never been on the left.