Republican Rep. Rodney Davis’ campaign field director was arrested and charged with aggravated assault Wednesday night after an altercation involving the Illinois lawmaker’s Democratic opponent, Betsy Dirksen Londrigan.

Levi Lovell was arrested at a Londrigan campaign event at a local bar, according to WCIA Chicago reporter Mark Maxwell. Lovell reportedly shouted at Londrigan, a businesswoman and former aide to Democratic Sen. Richard J. Durbin, and then punched someone at the event. Springfield Police confirmed to Roll Call that Lovell was booked into the Sangamon County detention facility.

WCIA showed video of Lovell following Londrigan and her husband around the bar at a campaign event as he tried to ask “menacing questions” while recording on his cell phone.

The response from the Davis campaign was swift.

“As soon as I was made aware of the incident, his employment was immediately terminated. This campaign has a zero-tolerance policy for harassment or violence of any kind,” campaign manager Matt Butcher said in a statement.