The police officers who stopped Oklahoma City motorist Chip Harrison and confiscated a sign from his car told him he has a right to his beliefs, but the Secret Service "could construe this as a threat against President Obama," according to the incident report released this morning.

'The Secret Service called and said they were at my house," Harrison said.

After talking to his attorney, Harrison went home where he met the Secret Service.

''When I was on my way there, the Secret Service called me and said they weren't going to ransack my house or anything ... they just wanted to (walk through the house) and make sure I wasn't a part of any hate groups."

Harrison said he invited the Secret Service agents into the house and they were "very cordial."

''We walked through the house and my wife and 2-year-old were in the house," Harrison said.

He said they interviewed him for about 30 minutes and then left, not finding any evidence Harrison was a threat to the president.

''I'm still in contact with a lawyer right now," Harrison said. "I don't know what I'm going to do."

Harrison said he feels his First Amendment rights were violated.