Donald Trump challenges Clinton to release medical records

Republican presidential nominee Donald Trump challenged Democratic rival Hillary Clinton to release "detailed medical records" and said he would have "no problem" releasing his own.

"I think that both candidates, Crooked Hillary and myself, should release detailed medical records. I have no problem in doing so! Hillary?" Trump tweeted on Sunday night.

Trump has long tried to portray Clinton as without sufficient stamina to serve as president, despite her reputation as one of the most travelled secretaries of state and profiles detailing her work ethics, CNN reported.

"#WheresHillary? Sleeping!!!!!" he recently tweeted.

The Republican presidential candidate's only public medical record -- a letter written by his physician that was released in December 2015 -- has recently been under scrutiny after NBC News reported the doctor only took five minutes to write it.

Questions about Clinton's health have also been pushed by Trump supporters and surrogates, CNN reported.

Clinton recently addressed the claims when she appeared on Jimmy Kimmel's show, calling it "part of the wacky strategy".

But, similar to Trump, Clinton's physician has repeatedly affirmed her health and fitness.