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.

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.

Paul has kept that independent streak, nevertheless. But in Trump’s first term, it didn’t seem to affect his relationship with the president. Paul was often seen as a counterweight to Sen. Lindsey Graham (R-SC) on foreign policy among Trump’s friends on Capitol Hill.

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