Trump: We could spend $30 billion more than estimated on military

President Donald Trump
Eric Thayer | Bloomberg | Getty Images

The United States needs to spend more money on the military to keep the nation safe, President Donald Trump told Fox News.

In a preview of the president's 9 p.m. ET address to a joint session of Congress, the White House said Trump's first budget will call for a $54 billion increase in defense spending and a corresponding cut in what the administration deems lower priority programs.

The military spending could be "$30 billion more than that," the president said on "Fox & Friends" in a taped interview that aired on Tuesday morning. "We're going to upgrade our military substantially."

Trump said when he's finished, the U.S. will have the greatest military the nation has ever seen.