A passionate McCain supporter at a Davenport, Iowa rally this week.

(CNN) – With recent polls showing Sen. Barack Obama's lead increasing nationwide and in several GOP-leaning states, some Republicans attending John McCain-Sarah Palin campaign rallies are showing a new emotion: rage.

At a rally in Minnesota on Friday, a woman told McCain: "I don't trust Obama. I have read about him and he's an Arab."

McCain shook his head and said, "No ma'am, no ma'am. He's a decent family man...[a] citizen that I just happen to have disagreements with on fundamental issues. That's what this campaign is all about."

One man at the rally said he was "scared of an Obama presidency." McCain later told the man he should not fear Obama.

"I want to be president of the United States, and I don't want Obama to be," he said. "But I have to tell you, I have to tell you, he is a decent person, and a person that you do not have to be scared as President of the United States."

McCain's response was met with boos from the crowd.

Watch: Rising anger at McCain rallies

When asked about these outbursts, McCain campaign manager Rick Davis said that he didn't know who those people were and if they were there as supporters or to disrupt the rallies.

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An angry supporter confronts Sen. John McCain at a rally in Wisconsin on Thursday.

(CNN) - With recent polls showing Sen. Barack Obama's lead increasing nationwide and in several GOP-leaning states, some Republicans attending McCain-Palin campaign rallies have taken on a new emotion: Rage.

"When you have an Obama, [House Speaker Nancy] Pelosi and the rest of the hooligans up there going to run this country, we have got to have our head examined. It's time that you two are representing us, and we are mad. So, go get them," one man told Sen. John McCain at a town hall meeting in Waukesha, Wisconsin.

Watch: Rage hits the McCain campaign trail

It's almost a cry for help, with the GOP party faithful amazed McCain could possibly be losing.

"And we're all wondering why that Obama is where he's at, how he got here. I mean, everybody in this room is stunned that we're in this position," another man said at a rally.

"I'm mad. I'm really mad. And what's going to surprise you, it's not the economy. It's the socialists taking over our country," another man said.

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