Reagan was an enrolled democrat until 1962. He was a union leader prior to entering politics. He must be a RINO.
Michelle Bachmann grew up in a Democrat family and campaigned for Carter. She, too, must be a RINO.
And don't forget Sarah Palin. While governor she supported a 25% profits tax on "big oil." What could be more RINO than that?
Reagan was campaigning for Republicans, Eisenhower in 1952, and 1956, and Nixon against JFK in 1960 in his role as 'A democrat for the Republican', and there is a huge difference between being a democrat in the 1930s and 1940s, and being an Al Gore democrat during the Reagan Revolution after the 1960s and Jimmy Carter and even Reagan himself.
You’re confusing RINO with CINO.