Mr Trump was asked by reporters aboard Air Force One on Friday whether he was was considering taking action over the New York Times op-ed. "We're going to take a look at what he had, what he gave, what he's talking about, also where he is right now".
In June under the Trump administration, Reality Winner, 26, pleaded guilty to a single count of transmitting national security information.
The piece's author, identified as a "senior administration official", said he is part of a resistance within the administration dedicated to "thwarting" parts of Trump' agenda and the president's "worst inclinations". If the person has a high-level security clearance, Trump said, "I don't want him in those meetings".
The writer, who described themselves as a senior official in the Trump administration, added that Mr Trump's "erratic behaviour would be more concerning if it weren't for unsung heroes in and around the White House".
"It may be cold comfort in this chaotic era, but Americans should know that there are adults in the room", the anonymous official wrote in the op-ed.
The op-ed claims that Cabinet officials discussed removing Trump from the presidency early on in his administration by invoking the 25th Amendment, but decided against such a move in order to avoid a "constitutional crisis".
Russian senate speaker meeting with North Korean leader in Pyongyang
Kim and Trump held a landmark summit in Singapore in June, in which they agreed to work toward complete denuclearization. And, speaking earlier Thursday in India, Pompeo said an "enormous amount of work" remains.
Trump fires back at Apple: Make your products in US
Trump said that if Apple wants to avoid tariffs on its products, it should make those devices in the US rather than China. Those steps include slapping tariffs on $60 billion of United States imports, Gao said.
South Korean envoys in meeting with Kim Jong Un
Kim said that declaring an end to the war is, above all, the first process in building trust between Washington and Pyongyang.
Ryan said he isn't anxious about President Donald Trump's public threats or inclinations toward shutting down the government in an effort to secure funding for his border wall. They were reported to have sent each other text messages with the phrase "the sleeper cells have awoken", according to "The Washington Post".
A June 1974 Associated Press report quoted Nixon as saying, "I don't know much about these things, but it scares the (expletive deleted) out of them".
"I don't see how we can do it", said Giuliani, who has repeatedly expressed concern about the risk of Trump committing perjury. While he didn't name names, he predicted that the identity would be become public and said people think it's "disgusting" the piece would be published. The Times stood by its story and dismissed a Trump attorney's demand for an apology and retraction.
Mr Obama has previously held back from openly criticising President Trump.
"Our libel laws are pathetic", he said.
The op-ed, written by a senior Trump administration official, bashed the President as amoral and claimed there is a "resistance" within the administration.
Before a campaign rally Thursday night, Trump said the New York Times' decision to publish the op-ed could be called "treason". Victor told the Federal Bureau of Investigation she mailed the document to an online news outlet.