WASHINGTON - Hillary Clinton's stumbling as she left Sunday's 9/11 memorial ceremony in New York City has put her health at the forefront of the presidential campaign.

Clinton -who's 68 - and Republican rival Donald Trump - who's 70 - are among the oldest major party nominees ever.

And they've disclosed a limited amount of information about their medical history.

Despite the intense focus on the Clinton's falling ill on Sunday, a bioethicist says the moment told voters little about Clinton's physical fitness.

Arthur Caplan of New York University Langone Medical Center says many people might stumble around, for lots of reasons, on a hot and humid summer day.

He says "without examining, without having the history ... you don't have a basis to say anything."