Clinton is in Iowa, where a CNN town hall is scheduled for tonight. Clinton is 68 years old.
New York Times reporter Amy Chozick wondered on Twitter whether Clinton would even be able to finish her remarks.
".@HillaryClinton has coughing attack at West Des Moines event, may be unable to finish remarks," Chozick said on Twitter.
Too bad she did not have a heart attack and drop dead right on the stage, that would have been some must see TV