"Look at the history books that refuse to mention Reagan when addressing the cold war. It's the same type of thing, just from a different groups agenda."
This sounded maybe a little far-fetched, so I went and grabbed my son's high school history textbook (we live in the SF Bay Area, which I hear is considered by some to be at least slightly to the left of center).
I wound up turning right to chapter 22, "A Conservative Era", which begins with a two-page photo of a smiling Ronald Reagan working a crowd, with the precis, "Ronald Reagan won the presidency in 1980 by appealing to a discontented electorate with the promise to return to a simpler time and conservative values. Reagan and his successor, George H.W. Bush, presided over the end of the Cold War and huge changes in economic and social policy." (American Anthem, Modern American History, Holt Rinehart Winston, California edition, 2007)
If there's a meme being spread that Evil PCers have expunged Reagan from history books, there's little evidence to support that here in California.