Washington (CNN) White House trade adviser Peter Navarro says no countries will be excluded from upcoming steel and aluminum tariffs set to be imposed by the Trump administration, including the United States' greatest allies.

"There's a difference between exemptions and country exclusions," Navarro, the director of the White House Office of Trade and Manufacturing Policy, said Sunday on CNN's "State of the Union" on Sunday. "There will be an exemption procedure for particular cases where we need to have exemptions so that business can move forward, but at this point in time, there will be no country exclusions."

Navarro said he expects President Donald Trump to sign the measures by the end of this week or early in the next. The economic adviser called the President's move, which will impose tariffs of 25 percent on steel and 10 percent on aluminum, a "courageous and tough decision."

Commerce Secretary Wilbur Ross also said he expects the tariffs to be put in place this week, but noted that whether they actually move forward ultimately will be up to Trump.

"Whatever his final decision is, is what will happen," Ross told NBC's "Meet the Press." If he says something different, it will be different. I have no reason to think he's going to change."

Read More