Congratulating him on the appointment, JD Vance wrote: "This is another fantastic pick by the president. Congrats @StephenM!"

Miller worked with Trump during his first term as the President.

During that phase, he worked as director of speechwriting and as a senior adviser to the president.

According to reports, Miller was an advocate for more restrictive immigration policy.

Miller is also a lead architect of the president-elect’s plans for mass deportations of undocumented immigrants, reported CNN.

Trump is expected to name Florida Senator Marco Rubio as the new Secretary of State, CNN reported on Tuesday.

The American news channel reported quoting two sources but said the decision is still not final.

One of the sources told CNN that the belief was that Trump was leaning toward Ric Grenell, but over the course of the day, he shifted his preference to Rubio after a number of calls and conversations with allies of the Florida senator.

Until an offer is formally made, another source told the news channel that Trump could change his mind.