Donald Trump rips 'son of the b----' who set up faulty mic at campaign rally

Real-estate tycoon Donald Trump blasted the unnamed "bastard" responsible for setting up a faulty sound system at a Wednesday-night campaign rally.

"And by the way, I don't like this mic," Trump said after criticizing US trade policy with China during his speech in Pensacola, Florida.

The Republican presidential front-runner then crudely instructed his staff to not pay the person responsible.

"Whoever the hell broke this mic system, don't pay the son of the b----," he said.

Trump added: "This mic is terrible. Stupid mic keeps popping. Do you hear that George? Don't pay him! Don't pay him. You know, I believe in paying, but when somebody does a bad job like this stupid mic, you shouldn't pay the bastard. Terrible. Terrible. It's true."

Trump said he hoped the sound system was functioning for the packed crowd, but he kept hearing a "boom" sound.

"So we're not going to pay," he continued. "I guarantee you I'm not paying for this mic. Every two minutes I hear like, 'Boom! Boom!'"

Reporters covering the rally said they had difficulty understanding the candidate as well.