I missed that comment by Arp and I would disagree. Almost all my friends and myself to a certain extent all were Republicans in our first forays into being able to vote but all turned into Democrats as we got older. Overall I think the statement is wrong no matter how you arrange it. It's probably more where you live and how your parents voted.
today's Republican party is a reactionary revolutionary party that has nothing in common with the party of Eisenhower. It's the Democrats who are the party of traditional main stream American values today.