Donald Trump is challenging Hillary Clinton to release “detailed” medical records and saying he would have “no problem” releasing his own.

Trump, who has long tried to portray Clinton as lacking the stamina to perform as president, tweeted his challenge to Clinton on Sunday night. As CNN writes, Trump’s only public medical record — a letter written by his physician — has been under scrutiny following a report the doctor took only five minutes to write it. Last year, Clinton’s physician wrote that the former secretary of state was in “excellent physical condition.” Clinton recently said charges she is physically unfit for the White House are part of a “wacky strategy” by Trump.