U.S. President Donald Trump is expected to forge ahead with his aggressive immigration crackdown driven by top aide Stephen Miller and a new homeland secretary nominee who shares Trump¡¯s hard-line view, current and former U.S. officials and lawmakers said.

The Republican president fired Homeland Security Secretary Kristi Noem on Thursday after months of controversy over heavy-handed immigration enforcement tactics and lawmaker questions about government contracts and turmoil within her department.

But Miller ¡ª the White House deputy chief of staff and the architect of Trump¡¯s immigration agenda ¡ª retains control of the issue, three U.S. officials said. And Trump¡¯s pick to become homeland secretary, U.S. Sen. Markwayne Mullin of Oklahoma, is viewed as closely aligned with Trump¡¯s approach.