'Anything more fun than a Trump rally'? asks the US presidential candidate after mayhem at rally

U.S. Secret Service agents detain a man after a disturbance as U.S. Republican presidential candidate Donald Trump spoke at Dayton International Airport in Dayton, Ohio March 12, 2016. REUTERS

US Secret Service agents detain a man after a disturbance as US Republican presidential candidate Donald Trump spoke at Dayton International Airport in Dayton, Ohio 12 March 2016. REUTERS

Secret Service agents surround U.S. Republican presidential candidate Donald Trump during a disturbance as he speaks at Dayton International Airport in Dayton, Ohio, March 12, 2016. REUTERS

Secret Service agents surround US Republican presidential candidate Donald Trump during a disturbance as he speaks at Dayton International Airport in Dayton, Ohio. Reuters

U.S. Secret Service agents detain a man after a disturbance as U.S. Republican presidential candidate Donald Trump spoke at Dayton International Airport in Dayton, Ohio March 12, 2016. REUTERS

US Secret Service agents detain another man at US Republican presidential candidate Donald Trump's speech at Dayton International Airport in Dayton, Ohio March 12, 2016. REUTERS

Trump supporters hold signs after Republican U.S. presidential candidate Donald Trump cancelled his rally at the University of Illinois at Chicago March 11, 2016. REUTERS

Trump supporters hold signs after Republican U.S. presidential candidate Donald Trump cancelled his rally at the University of Illinois at Chicago March 11, 2016. Reuters

A Trump supporter (R) yells at a demonstrator (L) after Republican U.S. presidential candidate Donald Trump cancelled his rally at the University of Illinois at Chicago March 11, 2016. REUTERS

A Trump supporter (R) yells at a demonstrator (L) after Republican US presidential candidate Donald Trump cancelled his rally at the University of Illinois at Chicago 11 March 2016. Reuters

Members of the cleaning crew sweep the floor at the UIC Pavilion after Republican U.S. presidential candidate Donald Trump cancelled his rally for safety reasons at the University of Illinois at Chicago March 11, 2016. REUTERS

Members of the cleaning crew sweep the floor at the UIC Pavilion after Republican US presidential candidate Donald Trump cancelled his rally for safety reasons at the University of Illinois at Chicago 11 March 2016. Reuters

A Trump supporter (R) talks to a demonstrator (L) after Republican U.S. presidential candidate Donald Trump cancelled his rally at the University of Illinois at Chicago March 11, 2016. REUTERS

A Trump supporter (R) talks to a demonstrator (L) after Republican US presidential candidate Donald Trump cancelled his rally at the University of Illinois at Chicago 11 March 2016. Reuters

Protesters against U.S. Republican presidential candidate Donald Trump rally ahead of his speech at the Peabody Opera House, in St. Louis, Missouri March 11, 2016. REUTERS

Protesters against US Republican presidential candidate Donald Trump rally ahead of his speech at the Peabody Opera House, in St. Louis, Missouri 11 March 2016. Reuters