The subtitle asks entirely the wrong question.
Of course Reagan would be welcomed in today's GOP; not even a question.
However Reagan would lose in a landslide in 2012's American electorate.
As would Abraham Lincoln.
As would George Washington.
Today's America has drifted too far from America's founding values to elect men who actually led according to those values.
Today's electorate would take a look at the most brilliant leaders in our country's history and ask them, "Where's my free stuff? What do you mean I have to work hard to succeed?!"