Wilson is good. Reagan is good too - but not so much while in office. With JFK, people wanted to dress like him and still do. That's style.
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Funny, I was just thinking... So McCain is a war hero, a former prisoner of war, and a distinguished veteran of Vietnam. What's the quickest way to get people to forget about all of that? Become a politician I suppose.
I'll give you that people wanted to dress like a Kennedy in the 60s, it's just that I don't think it is as good as those other two. Reagan's look was underrated I think, because he dressed in a more classic style than what was popular in the 80s. However he still had panache. As for Wilson it's simply hard to find any faults with anything he ever wore.
ETA: Honestly I don't think many people are emulating the Jack Kennedy style of suit these days. And definitely not his ties or shirts.