Republican Senator Rand Paul was also at the scene of the Congressional baseball shooting in June, when Bernie Sanders supporter James Hodgkinson opened fire, critically injuring Rep. Steve Scalise.
The suspect was identified as 59-year-old Rene Boucher of Bowling Green, according to a statement from police.
The Republican "was blindsided and the victim of an assault" on Friday, a spokeswoman for him was quoted by U.S. media as saying.
Troopers responded to Paul's residence at 3:21pm on Friday after reports of an assault. Stay with 8News online and on air for the latest updates. The Washington Post reported that Paul lived in the same neighborhood. Police arrested a man named Rene Albert Boucher, who they allege "intentionally assaulted" Paul, causing him "minor injury". He was being held Saturday afternoon at the Warren County Regional Jail in lieu of a $5,000 bond.More news: Right wing activist banned from Uber for "non-Muslim cab drivers" tweet
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A jail website shows that Boucher was booked Friday night just before 9 p.m. The senator did not see Boucher approach as the properties of Paul and Boucher are adjacent.
An investigation continues, police said.
"We are working with our state and local partners to determine if there was a violation of federal law, " FBI spokesman David Habich told USA Today. The incident took place at Paul's home in Warren County.
Rand Paul tweeted about the incident on Sunday morning saying: "Kelley and I appreciate the overwhelming support after Friday's unfortunate event".