Maryland Gov. Martin O’Malley (D) and one of his favorite Republican targets, New Jersey Gov. Chris Christie (R), are scheduled to face off on national television Sunday.

Maryland Gov. Martin O’Malley (D) spoke about New Jersey Gov. Chris Christie during a previous appearance on “Face the Nation.” (Photo courtesy CBS)

In his capacity as chairman of the Democratic Governors Association, O’Malley has taken repeated shots at Christie, holding him up as an example of what is wrong with Republican governors.

In a speech last summer in Utah, O’Malley referred to Christie, as he often does, as a “colorful character” who lives in a “make-believe world, where down is up, up is down, candy is a vegetable, and vegetables are candy.”

Christie has said O’Malley criticizes him to get his name in the newspaper.

Both governors have been in the news lately on the issue of same-sex marriage. O’Malley is pushing the Maryland legislature to send him a bill to sign legalizing gay nuptials. Christie last week vetoed one in New Jersey.