United Nations Ambassador Nikki Haley said this morning that the Trump administration is taking a new, tougher approach toward China in an effort to deter North Korean aggression. 

Haley talked with Bill Hemmer amid Secretary of State Rex Tillerson's first trip to the region. Speaking from the Korean Demilitarized Zone, Tillerson told Fox News that "nothing has been taken off the table" when it comes to dealing with the rogue regime.

He also refused to rule out increased weaponization and even nuclearization of America’s East Asian allies to counter Pyongyang's advancement of its nuclear and ballistic missile programs.

The president also took to Twitter on the matter this morning:

Haley said the United States has taken a "soft" stance toward China, but the new administration plans to "go harder" and make China prove they're serious about deterring North Korea.

"Don't just tell us you do. Prove it. It's gotta be real proof," said Haley, calling on Beijing to push for more sanctions and renewed negotiations.

She said North Korean dictator Kim Jong Un is conducting increased missile tests and is suspected of ordering the assassination of his estranged half-brother at a Malaysian airport.

"These are problems. It shows they are not listening and that nothing has worked," said Haley. 

Watch her comments on "America's Newsroom" above.

UPDATE: White House Tells All VA Facilities to Hang President's Portrait

Krauthammer: Trump's Budget Proposal Is 'Dead on Arrival'

WATCH: Malkin Blasts 'Tyrant' Federal Judges After Rulings Against Travel Ban