(Image Credit: Michael Yarish/AMC)

The hit AMC TV show " Mad Men" took a not-so-subtle swipe at  a Romney Sunday night - George Romney, the  father of presidential contender Mitt Romney, that is.

In the 1960s-era  series, the character  Henry Francis, who in previous seasons worked as a political aide for New York Gov. Nelson Rockefeller, calls  Gov. George Romney, who led the state of Michigan  from 1963-1969, a clown.

"Well, tell Jim his honor's not going to Michigan," Francis says during a work-related phone conversation in Sunday's episode. "Because Romney's a clown, and I don't want him standing next to him."

Mitt Romney's son Tagg responded to the remark on Monday, taking is ire over the comment to Twitter.

"Seriously, lib media mocking my dead grandpa?," Tagg tweeted. "George Romney was as good a man I've ever known. Inspirational leader, worked for civil rights, promoted freedom. We need more like him."

"Mad Men," which follows life in an advertising agency in the early- to mid-1960s, has delved into politics before, most notably  the presidential battle between John F. Kennedy and Richard M. Nixon, in season one. Employees in the ad agency, which was working with the Nixon campaign, were shown cheering and celebrating Nixon's victory in the pivotal state of Ohio at the beginning of the twelfth episode.

"Kennedy? Nouveau riche, a recent immigrant who bought his way into Harvard," Don Draper, the main ad man, says. "Nixon is from nothing. Abe Lincoln of California, a self-made man. Kennedy, I see a silver spoon. Nixon, I see myself."

The closing scene of that episode showed a gloomy Draper as he watched  Nixon's concession speech.

If those infamous  "mad" ad men  of the '60s were to take on the current presidential race, would their reactions be the same? ABC's Top Line anchors took a look at which retro ad man best characterizes the five candidates currently vying for the White House.

Take a look at that Top Line episode here: