Watch Obama's spokesman respond to Donald Trump's medical report

White House Press Secretary Josh Earnest couldn't help but laugh when asked to respond to a claim in Donald Trump's medical report that he would be America's "healthiest" president.

"If elected, Mr. Trump, I can state unequivocally, will be the healthiest individual ever elected to the presidency," Dr. Harold Bornstein, a New York-based gastroenterologist, wrote Monday in a statement released by the Republican front-runner's campaign.

Bornstein claims he's been Trump's personal physician for nearly four decades.

"Do you accept that President Obama is not as healthy as Donald Trump?" a reporter asked Earnest during his daily press briefing Monday afternoon.