A bitter feud is escalating between Republican Sen. Rand Paul and Donald Trump’s top border official, injecting uncertainty into Congress’s attempt to pass the administration’s signature policy bill this month.

President Donald Trump viciously attacked Senator Rand Paul to his face during the 2016 Republican Primary debates, claiming that he has donated vast amounts of money to the U.S. Senator from Kentucky.

Some have likened the parade to the military chest-pounding commonly seen in North Korea. "We were proud not to be that," Paul said.