Nearly two-thirds of voters surveyed by Morning Consult want Hillary Clinton and Donald Trump to release detailed information about their medical history.

Approximately 64 percent of registered voters polled Aug. 23-24 said the candidates should release their medical records, up 9 percentage points from May. Morning Consult surveyed 2,102 registered voters for its August survey with a margin of error of 2 percentage points.

Interestingly, a majority of voters under 30 years old said the candidates should not release information about their health while 82 percent of those older than 65 said the candidates should release medical such records.

Neither Clinton, 68, nor Trump, 70, have made such information public. Both candidates' campaigns have published letters from their candidates' purported doctors claiming the GOP and Democratic nominees are in good health. The letter from Trump's doctor claims, "If elected, Mr. Trump, I can state unequivocally, will be the healthiest individual ever elected to the presidency."

The candidates' health has become a topic of discussion after Trump supporters raised questions and made accusations about Clinton's health. Fox News' Sean Hannity, an informal Trump adviser, has pushed the notion that Clinton may have had a stroke. The Drudge Report, a pro-Trump website, similarly has splashed photos and headlines designed to make an issue of Clinton's health.

As the Washington Examiner's Paige Winfield Cunningham wrote earlier this week, Clinton does have hypothyroidism, a condition affecting about 10 million Americans in which the thyroid is underactive. The Democratic nominee has recently talked about her health in a campaign-sponsored podcast and made jokes about the rumors surrounding her health on a late-night talk show.