alternatehistory.com

I the OTL, there are many who became Conservatives who were once Liberals, and many Liberals that were once Conservatives. So who could have been a Liberal or Conservative given different circumstances?

Some that come to mind (albeit I don't know the circumstances to keep them to their original ideology):

Ronald Reagan
New Deal Democrat turned Goldwater Conservative after reading "Witness" by Whittaker Chambers.

Hillary Clinton

Loyal Goldwaterite who became Liberal over the decades.

Oliver Stone

I was surprised by this fact when I was reading a book on the Baby Boomers. Apparently, during the early 60's Stone considered himself a very mundane, loyal Republican who wanted Goldwater to win in '64 and all that.
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