While the presidential debates spark intellectual discourse for some, for others, they spark fury.

MSNBC host Lawrence O’Donnell became so angry at presidential candidate Mitt Romney’s son Tagg during Thursday night’s “The Last Word” that he actually challenged him, whom he calls “Taggart,” to a fist fight.

“Take a swing at me,” O’Donnell said on the live broadcast.

Visit NBCNews.com for breaking news, world news, and news about the economy

His challenge comes from comments Tagg Romney made this week when he admitted to having feelings of wanting to hit President Barack Obama for calling his father a liar during the second presidential debate on Tuesday.

“OK Taggart,” O’Donnell began in a purposely heavier Boston accent. “Let’s have a little talk, just you and me.”

“When I hear you talk about taking a swing and taking punches, why do I get the feeling you have never actually taken a punch, or thrown a punch. I didn’t have that luxury in the part of Boston I grew up in. But in your rich, suburban, Boston life, with your father filling a $100 million trust fund for you. I don’t know, I just get the feeling things were kind of different for you.”

O’Donnell also made comments about his name, Taggart, saying he understands being “pissed off” if his name is Taggart.

“You’re mad at President Obama for calling your father a liar?” O’Donnell continued. “Let’s get something straight. He didn’t call your father a liar. I did. I’ve been saying all year that your father is a liar. I’ve repeatedly said that your father lies and is trying to lie his way into the White House.”

“So, you want to take a swing at someone for calling your old man a liar? Take a swing at me. Come on. Come on. And don’t worry. There won’t be any Secret Service involved. Just us. And I’ll make it easy for you. I’ll come to you. Anytime, anywhere. Go ahead, Taggart. Take your best shot,” he concluded.

But he didn't stop there. O'Donnell even posted the challenge on Twitter to Tagg.

"Tagg Romney wants to take a swing at President for calling his dad a liar. I called him a liar too. Go ahead, Tagg, take your best shot," he wrote.

Others on Twitter also sided with O'Donnell, like user chandlejr, who tweeted, "I'm 61 years old, but Tagg wouldn't last 60 seconds with me in UFC cage--no brag just fact."

Previously, Tagg Romney said he wanted to “take a swing” at the President following the debate. Romney said he wanted to “jump out of [his] seat and … rush down to the debate stage and take a swing at him.”

“But you know you can’t do that because, well first because there’s a lot of Secret Service between you and him,” Romney continued. “But also because this is the nature of the process, they’re going to do everything they can do to try to make my dad into someone he’s not. We signed up for it. We’ve gotta kinda sit there and take our punches and then send them right back the other way.”