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State Department spokeswoman Heather Nauert said "all options have to be on the table" with the North Korean nuclear threat.

Trump spoke to the United Nations on Monday, warning leaders to make sure "no member state shoulders a disproportionate share of the burden."

On the second day of talks Tuesday, the president will stress the problems the international community faces with North Korea and Iran.

"Diplomacy is always the preferred approach," Nauert told "Fox & Friends" on Tuesday morning.

"China is a huge piece of it," the former Fox News anchor explained, adding that China supported the last two UN Security Council resolutions that cracked down on funds flowing into North Korea, often funding its nuclear program.

Another tactic is for countries to kick out North Korean guest workers, cutting off cash flow into the rogue nation that way, Nauert said.

The president wants the United Nations to be generally more about helping people and less about being a "bloated bureaucracy," Nauert said.

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