JD Vance: Trump likes more conservative dress. I learned this the hard way last year because it’s tradition for the vice president to welcome the Irish prime minister every St. Patrick’s Day. I decided to wear my shamrock socks to welcome the Irish prime minister. We’re sitting down in front of God and everybody — probably a hundred TV cameras during a live press conference — and the president starts his remarks, then looks over and says, “What is going on with those socks?” So I learned the hard way: dress conservatively around the president of the United States.