[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/10/12/art.mccainrally01.gi.jpg caption="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.