Political commentator David Gergen, who has served under four presidents, accused Donald Trump of turning the 2016 election into a "national joke" by appearing on The Dr. Oz Show to discuss his health.

After initial reports suggested that Trump would be revealing the results of a recent medical exam on Dr. Mehmet Oz's show, the campaign backtracked on Wednesday and said that only general health information would be discussed.

"The losers are clearly the American voters," Gergen told CNN host Ashleigh Banfield on Wednesday. "I do think Trump has been much more secretive than Hillary Clinton. And for him to use The Dr. Oz Show as a forum to have his health all sorted out trivializes this whole exercise."

"And I think it makes it more of a national joke," he added. "Whoever wins is going to be in their 70s and the country deserves to know, what are the prospects for this person's health? Are there any clouds that might impair the judgement of a person who is going to be the president?"

Gergen argued that the "one-page summary" that Trump's doctor provided to Oz was "ludicrous on its face."