WHITEWATER, Wis. -

An anonymous reward of $500 has been offered for information that leads to the arrests of people involved in an assault on the adult son of state Sen. Neal Kedzie.

Sen. Kedzie said his 22-year-old son, Sean, was attacked early Friday morning by two men after confronting one of them for taking down a Romney/Ryan campaign sign outside Sean Kedzie's residence in Whitewater.

Police said they are looking for two white men described as clean shaven, around six feet tall, weighing around 185 to 190 pounds. Police said one man had short light colored hair, and the other had darker hair.

Sources tell WISC-TV that a student athlete at UW-Whitewater has been questioned in the case.

"I saw two guys walking by. One of them picked up the sign and kept walking, so I opened the front door, ran outside and said, 'Hey, I think you've got something that belongs to me in your hands,'" Sean Kedzie said.

The Republican senator from Elkhorn told the Milwaukee Journal Sentinel his son was wrestled to the ground, beaten and choked.

"They grabbed me again, wrapped their legs around my legs, took me to the ground," Sean Kedzie said. "The one guy put me in a chokehold. He was punching me with his free hand while the other guy, (with) both hands, went at it."

The elder Kedzie said Monday his son was treated at a hospital and released. He said the attack is inexcusable.

"Sean isn't an elected official. He didn't ask for this," Neal Kedzie said.

The senator said he has become used to people dumping nails in his driveway and even shooting paintballs at his house, but he said he never thought his son would be a target.

"He's shaken -- anyone would be. I would be. This is a senseless act of violence that should not be put upon anyone. This is not how people treat other people," Neal Kedzie said.

Sean Kedzie said he doesn't believe he was target because of who his dad is but rather solely because of the political sign he had displayed.

"It's getting to the point where you can't express your political beliefs anymore. This is the United States; this is where we're supposed to have freedom, and freedom's not really free anymore," Sean Kedzie said.

Sean and his father said they hope this experience will open up the eyes of others and send a message that politically motivated violence needs to stop.