WATCH: Trump mocks Asian allies of the United States as his tax reform speech goes off script

President Donald Trump on Wednesday mocked allies of the United States, accusing them of not contributing towards their own national defense.

Trump said during a speech on tax reform that his trip to Asia was a "tremendous success." But he complained that the U.S. military was defending some wealthy countries in the region.

"I say why are we defending them? We love them. I won't mention names. But there are a lot of them. We love them, they're wealthy."

"It's going to change, folks. We're going to defend them but they're going to treat us fairly and they're going to pay for their defense," Trump continued. "Does that make sense?"

"When I was in Asia, I spoke to a couple of the countries about it and they looked like this," Trump said, imitating an Asian leader. "You know what this is? Hmm-hmm. That means they know they're getting away with murder and they got to start helping us out. Okay?"

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