Kentucky Republican Senator Rand Paul is assaulted in his home Friday.
The alleged assailant was arrested and "Senator Paul is fine", Kelsey Cooper said, according to The Hill news website.
Mr Paul, the junior senator for Kentucky, suffered minor injuries as a result of the assault.
Paul posted on his Twitter account Sunday that he and his wife were grateful for the support "after Friday's unfortunate incident".
Boucher admitted to tackling Paul, the criminal complaint says.
Paul is a second term Senator who has served in the Senate since 2011.
Troopers determined that Rene A. Boucher, 59, had "intentionally assaulted Paul causing a minor injury", the news release said.
However, Boucher is an anesthesiologist and pain specialist in Bowling Green, who developed a product called Therm-a-Vest. It was unclear if Boucher has an attorney, and he could not be reached for comment late on Saturday.