That makes sense, but when world leaders such as former businessman Donald Trump and dictator Kim Jong-un are throwing school yard insults at each other, it's hard not to stick your nose in.
"We don't, I don't, I don't allow the staff to", Kelly said, adding that the tweets "are what they are".
A particularly stern speech from Mr Trump in South Korea prompted Kim's government to brand him an "old lunatic" - the latest broadside in a long-running war of words between the two leaders.
Trump has called Kim "rocket man" and Kim has called Trump a "mentally deranged US dotard", a "gangster fond of playing with fire", and "a frightened dog".
Trump, who is 71 years old, made the comment after attending the Asia-Pacific Economic Cooperation (APEC) summit in Vietnam.
The Asian giant is keeping the economically unstable nation financially afloat, and Trump has claimed China "can fix this problem easily - and quickly" by using its influence over the hermit state.
"Why would Kim Jong-in insult me by calling me "old, ' when I would NEVER call him 'short and fat"?" the president tweeted from Hanoi - the penultimate stop on a lengthy Asia tour that had, until then, appeared to have moderated his Twitter habit.
Asked at a news conference in Vietnam if he could see himself being friends with Kim, the Trump replied: "That might be a odd thing to happen, but it's a possibility".
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One of those men was also stabbed before they were able to disarm the suspect, police said during a media briefing Sunday evening. She described the incident as "the scariest thing ever", and said the only thing she could think was "I have to stay alive".
"If that did happen, it would be a good thing, I can tell you, for North Korea. I don't know if it will, but it would be very, very nice if it did".
She said she was protesting against Donald Trump's attitude to women and his failure to meet with human rights activists in Vietnam.
'North Korea seeks to exploit busy trading hubs like Hong Kong in order to raise revenue for its illegal weapons programs, ' Mr Turnbull said, The Australian reported.
When he raised concerns over China's increasing military capability in the South China Sea, Mr Duterte said Mr Xi replied, "No, it's nothing".
In his tour of Asia, Trump has warned North Korea not to stretch USA patience, but also suggested the possibility of a diplomatic solution to the crisis.
"He also said the USA has "two or three channels" in which they can send messages to Kim and receive them back".
Mr Duterte took steps to thaw frosty relations with China after he won the presidency previous year.