White House Press Secretary Sarah Sanders said Wednesday that the United States will continue its "maximum pressure campaign" on North Korea if next month's summit does not happen. 

North Korea threatened Tuesday to cancel the June 12 face-to-face talks between Kim Jong Un and President Donald Trump in Singapore. Pyongyang stated that it would not entertain a "a one-sided demand" from Trump for the country to give up its nuclear weapons.

The announcement came hours after North Korea canceled high-level talks with South Korea over Seoul's joint military exercises with the U.S.

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Sanders said the president remains "hopeful" that the meeting will happen. 

"We’ve been prepared that these could be tough negotiations. The president is ready if the meeting takes place. And if it doesn’t we’ll continue the maximum pressure campaign that’s been ongoing," she told "Fox & Friends."

She said the latest developments are not "out of the ordinary," calling Trump "the toughest negotiator around."

Watch the interview above.

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