White House senior adviser Stephen Miller on Monday voiced support for an immigration system that favors foreign nationals who can become "more" assimilated into American culture.

"We can have an immigration system that 10, 20, 30, 50 years from now produces more assimilation, higher wages, more economic opportunity and better prospects for immigrants and U.S.-born alike," Miller said on Fox News's "Tucker Carlson Tonight."

Miller pushed the White House message on immigration reform, calling for a border wall and an end to "chain" migration, the process by which an immigrant can petition to bring family members to the United States, as well as the adjustment of the country's visa lottery system.

He said Democrats, who are fighting for a new plan on the Deferred Action for Childhood Arrivals program, need to face reality and "ultimately have to make a choice" as the Jan. 19 spending bill battle approaches.

"If Democrats oppose a border, they are just saying they want continued, unending illegal immigration," Miller told Carlson.

"There are 7 billion people in the world. Most of them are good, hardworking, decent, honest, principled people. But the reality is there's a limit to how many people any country can bring in and we as a country have a right to say we want to bring people in based on their ability to contribute to our economy, to be safe, productive citizens and to uplift the nation as a whole," he said.

During his interview with Carlson, the White House aide continued to take more shots at CNN's coverage of President Trump, one day after getting into a heated argument with CNN host Jake Tapper.

The back and forth continued off camera until security ultimately escorted Miller from the set.

Miller described the leaked news of his removal as "just another example of CNN's very low journalistic standards."

"I was glad to have people hear what I set on camera and off camera, which is that CNN has been extraordinarily biased, extraordinarily unfair to the president and ... is not giving their viewers honest information," he said.