Trump seen jumping as security forced to rush stage in Ohio
DONALD Trump's usual unflappable form deserted him at a rally in Dayton, Ohio.
A video caught the moment Mr Trump became jumpy after an audience member tried to breach the security barrier.
The Republican presidential hopeful was surrounded and manhandled by security but did not leave the stage.
"I was ready for him, but it's much easier if the cops do it, don't we agree?" Mr Trump said to the crowd.
A man named Thomas Dimassimo was later arrested and charged with disorderly conduct and inducing panic, ABC News reported.
"Trump was giving his speech and everyone was into it. And within about a split second somebody from around the bend had jumped over the fence and was charging Donald Trump," eyewitness Chris Famiano told ABC.
"And before you know it the Secret Service had like four or five guys on him, they wrestled him to the ground."
"They put him in the ties and then they took him away."
The speech continued without further incident. Mr Trump also spoke in Cleveland, Ohio.
Mr Trump later said that the Dayton event was the "largest in airport history."
A rally in Cincinnati, which had been reported as cancelled, is also set to go ahead on Sunday, according to Mr Trump.
The incident follows a rally in Chicago which was abandoned on Friday night after protests turned violent.
A campaign statement said: "Mr Trump just arrived in Chicago and after meeting with law enforcement has determined that for the safety of all of the tens of thousands of people that have gathered in and around the arena, tonight's rally will be postponed to another date."
"Thank you very much for your attendance and please go in peace."
Chicago police later denied that the Trump campaign had discussed postponing the event with them.
Five people, including one journalist, were arrested and two police officers were hurt during the disorder.
Mr Trump later blamed "Clinton and Sanders people" for the disruption.