WASHINGTON — President Donald Trump boasted Tuesday that he has a bigger and more powerful "nuclear button" than North Korean leader Kim Jong Un.
The president's Tuesday evening tweet came in response to Kim's New Year's address, in which he repeated fiery nuclear threats against the United States. He said he has a "nuclear button" on his office desk and warned that "the whole territory of the U.S. is within the range of our nuclear strike."
Trump mocked that assertion, writing, "Will someone from his depleted and food starved regime please inform him that I too have a Nuclear Button, but it is a much bigger & more powerful one than his, and my Button works!"
Earlier Tuesday, Trump sounded open to the possibility of an inter-Korean dialogue after made a rare overture toward South Korea in a New Year's address. But Trump's ambassador to the United Nations insisted talks would not be meaningful unless the North was getting rid of its nuclear weapons.
In a morning tweet, Trump said the U.S.-led campaign of sanctions and other pressure were beginning to have a "big impact" on North Korea. He referred to the recent, dramatic escape of at least two North Korean soldiers across the heavily militarized border into South Korea. He also alluded to Kim's comments Monday that he was willing to send a delegation to the Winter Olympics, which will be hosted by South Korea next month.
"Soldiers are dangerously fleeing to South Korea. Rocket man now wants to talk to South Korea for first time. Perhaps that is good news, perhaps not — we will see!" Trump said, using his derisive moniker for the young North Korean leader.
While Trump ratcheted up the tension Tuesday night, he doesn't actually have a physical nuclear button.
The process for launching a nuclear strike is secret and complex, and involves the use of a nuclear "football," which is carried by a rotating group of military officers everywhere the president goes and is equipped with communication tools and a book with prepared war plans.
If the president were to order a strike, he would identify himself to military officials at the Pentagon with codes unique to him. Those codes are recorded on a card known as the "biscuit" that is carried by the president at all times. He would then transmit the launch order to the Pentagon and Strategic Command.
North Korea has been punished with unprecedented sanctions at the U.N. over its weapons programs, and Haley warned Tuesday of more measures if the North conducts another missile test.
South Korea's liberal President Moon Jae-in has supported Trump's pressure campaign against North Korea, but he's less confrontational than the U.S. president and favors dialogue to ease the North's nuclear threats. Moon has long said he sees the Pyeongchang Olympics as a chance to improve inter-Korean ties.
White House spokeswoman Sarah Huckabee Sanders said the U.S. would continue to put "maximum pressure" on North Korea to give up its nukes. She added that South Korea shares that goal.