Donald Trump keeps sniffling during presidential elections and the internet wants to know why...

Republican party candidate Donald Trump who recently raised questions about Hillary Clinton’s health, claiming she had no stamina, appeared to be sniffling during the U.S presidential debate on Monday night—and social media users took notice.

Clinton was diagnosed with pneumonia earlier this month and her campaign team has constantly refuted claims by Donald Trump that she is not medically fit to be president, so Twitter users reacted when they saw Trump sniffling repeatedly. 

More tweets below...