Story highlights "Shame on you Bernie," the protester said, feet from the Democratic presidential candidate

After the protester was escorted out, Sanders said, "I say to Mr. Trump and his supporters that the billionaires of this country will not continue to own this nation"

Amherst, Massachusetts (CNN) Bernie Sanders' campaign rally here was briefly interrupted Saturday when a man wearing a Donald Trump shirt began shouting at the senator.

"Shame on you Bernie," the man said as he stood up in the third row of the auditorium, feet from the Democratic presidential candidate.

"Here is a Trump supporter," Sanders said from the stage, causing the entire crowd to boo the proud protester as he was being escorted out by Sanders' staff.

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The man, who fist-pumped as he exited the room, also held a sign that read, "Obama is as Christian as Bruce Jenner is a woman."