Thanks an awful lot, George. That bizarre physical threat made by congressman Michael Grimm to a reporter on camera right after the president's speech. ABC's Jeff Zeleny has the story. You're not man... See More
Thanks an awful lot, George. That bizarre physical threat made by congressman Michael Grimm to a reporter on camera right after the president's speech. ABC's Jeff Zeleny has the story. You're not man enough. I'll break you in half like a boy. Reporter: This morning new York republican congressman Michael Grimm is on the defensive for this exchange with the local New York television reporter. After this state of the union. And just finally before we let you go, since we have you here, we haven't had a chance to talk about some of -- ? I'm not speaking about anything off topic. Only about the president, thank you. All right, so congressman Michael Grimm does not want to talk about some of the allegations concerning his campaign finances. We wanted to get him on camera on that, but he as you saw refused to talk about that. Back to you. Reporter: Watch what happens next. Why? -- Let me be clear to you. If you ever do that to me again I'll throw you off the Balcony. I wanted to ask you -- If you ever do that to me again -- Why? Why, it's a valid question. No, no, you're not man enough. You're not man enough. I'll break you in half like a boy. Reporter: So what brought this on? Congressman Grimm a retired marine and former FBI agent is under investigation by the FBI himself on suspicion of accepting illegal campaign contributions, a topic the reporter broached. Isince he was right in front of me he said no off topic questions and walked away. My question is to ask questions, ask questions about a variety of different topics. Reporter: It made bigger headlines than this reporter envisioned. If you ever do that to me again I'll throw you off this Balcony. Reporter: The congressman is not backing down and calling the question a cheap shot and saying I'm not the first congressman to ever tell a reporter off. Usually it's not on camera. Not like that. That tape is going to live for a long time, okay, Jeff, thankou very much.
This transcript has been automatically generated and may not be 100% accurate.