Dem senator: Trump's remark on nuclear button 'borders on presidential malpractice'

Dem senator: Trump's remark on nuclear button 'borders on presidential malpractice'
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Sen. Ed MarkeyEdward (Ed) John MarkeyOvernight Energy: Watchdog investigating EPA enforcement numbers | EPA's Wheeler faces Senate grilling | Interior's offshore drilling staff returning to work during shutdown EPA's Wheeler faces grilling over rule rollbacks Ocasio-Cortez, progressives express disappointment with climate panel MORE (D-Mass.) said on Tuesday that President TrumpDonald John TrumpVeterans groups demand end to shutdown: 'Get your act together' Brown launches tour in four early nominating states amid 2020 consideration Pence on border wall: Trump won't be ‘deterred’ by Dem ‘obstruction’ MORE's claim that the U.S. nuclear launch button is "much bigger" than North Korea's "borders on presidential malpractice."

"Imagine being a servicemember or the family of a servicemember stationed in Korea and reading this," Markey tweeted. "This borders on presidential malpractice."

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Markey's tweet followed one by Trump, in which the president warned that the U.S. nuclear launch button was "more powerful" than the one North Korean leader Kim Jong Un claimed to have in a New Year's Day speech this week.

In that speech, Kim said that the world would have to accept North Korea as a nuclear-armed state, saying the fact that he had a nuclear launch button on his desk was a "reality," as opposed to a threat.

Trump's tweet appeared to challenge that claim. He also warned that the U.S. launch button actually worked. 

Trump and North Korea have exchanged barbs for much of his first year in office, as Pyongyang stepped up the pace of its intercontinental ballistic missile tests.

The U.S. president has also repeatedly warned that possible military action against North Korea remains on the table if deemed necessary.