The Walkers are a very rich and eccentric married coupled. They are key donors to Donald's campaign so him and Phil try very hard to entertain them. They dote on their daughter Violet and are very disapproving of the boys she dates.
Mark meets the Walkers at Donald's first fundraiser, the couple is very amused by Mark's top hat and faux wise persona. They introduce their daughter to Mark who decidedly less impressed with him. Days later the couple asks Phil to take Violet and Mark to a ballet concert.