Romney son blasts 'liberal media' over 'Mad Men' swipe

In the show, character Henry Francis, a Republican political aide who had worked for New York Gov. Nelson Rockefeller in previous seasons, is shown fielding a request for his new boss — strongly hinted to be New York City Mayor John Lindsay — to travel to Michigan to appear with then-Gov. George Romney.

“Well, tell Jim his honor’s not going to Michigan. Because Romney’s a clown and I don’t want him standing next to him," Francis responds.

Tagg has been a vocal supporter of his father, campaigning in key primary states throughout the year. He's also frequently tweeted behind-the-scenes commentary about life on the campaign trail, posting videos of his family at the movies or his father doing laundry.

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