Kelly also addressed Trump's tweet Thursday morning that FEMA and other rescue workers couldn't be kept in hurricane-ravaged Puerto Rico "forever", and reiterated that the president believes the USA citizens there deserve the same support as those who were hit by hurricanes earlier this year in Texas and Florida.
"Although I read it all the time, pretty consistently, I'm not quitting today", Kelly said in his first public appearance at a White House press briefing.
"I have found that Mr. Trump, from the day I met him, he is a decisive guy, he is a very thoughtful man", Kelly added. Reports have also claimed that Kelly is miserable as White House chief of staff and frustrated.
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"Right now we think the threat is manageable but over time if it grows beyond where it is today, well, let's hope that diplomacy works", said Kelly, a retired Marine Corps general. "But when I read in the morning, I read - I won't tell you what I read, but when I watch TV in the morning, it's astounding to me how much is misreported".
Nielsen, however, has drawn some resentment in her current White House position, as she and Kelly have tried to instil more discipline at the White House.
Kelly also addressed a separate question on whether Americans should be concerned about North Korea.
One former Homeland Security official, who asked for anonymity so that the person could speak candidly, says the pick is a controversial one, and that people at the department are already speaking about leaving if the nomination moves forward. "I was not brought to this job to control anything but the flow of information to our president so that he can make the best decisions". "I will give you the benefit of the doubt that you are operating off of contacts, leaks, whatever you call them, but I will just offer to you the advice, I'd say maybe develop some better sources".