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.

Stephen Miller arrived on Capitol Hill Thursday to brief Senate Republicans on the White House's border wall request.

Immigration and Customs Enforcement raids that inspired protests around Los Angeles over the weekend are part of a crackdown spearheaded by the architect of President Donald Trump’s most extreme immigration policies,