Rene Boucher, 59, was arrested and charged with assault in the attack, according to Kentucky State Police.
"Senator Paul was blindsided and the victim of an assault," Kelsey Cooper, a spokesman for the Kentucky Republican, told the Bowling Green Daily News. "The assailant was arrested and it is now a matter for the police."
The details and circumstances for the assault were not released. Paul suffered minor injuries in the incident and is fine, Cooper said.