Spicer said Trump met Tuesday with Pruitt - who has called the Paris pact a "bad business deal" for the US - to discuss the matter, and an announcement will be made "shortly". He claimed that the president single-handedly "united the civilized world in the fight against terrorism and extremism" and that his meetings at the Group of Seven summit in Sicily "were marked by outstanding success".
Mr. Trump has railed against the news media and what he considers "fake news" since the presidential campaign.
But it is his chilling suggestion that reporters' sources should be "accountable" that proved a disturbing echo of White House counselor Kellyanne Conway's similar desire that there be "consequences" for those who criticize Trump, not to mention seeming like an extension of Trump's own all-out assault on the free press.
Over the weekend, White House National Economic Council Director Gary Cohn - who was the second-in-command at Goldman Sachs before joining the White House - declared the president's economic development deal with Saudi Arabia to be unlike anything he had seen in his 30 years in business.
Pressed for another example, Spicer said he "didn't come here with a list of things".
That was later proved to be inaccurate, with Mr Spicer explaining via Twitter that the President wears an earpiece in his right ear for translations - the ear that could not be seen in the clip shared. "And he is probably the best person to communicate that".
"[Goldmacher] retweeted that the president was being booed by disrespecting the Italian prime minister", Spicer charged. He compared the exaggerations to North Korean propaganda.
In all, Spicer spent just about half hour with reporters - with much of that time used to deliver his defense of Trump's foreign trip.
"It's baffling, because it doesn't convince anyone".
Spicer also said the president is meeting Tuesday afternoon with two more candidates to replace James Comey for Federal Bureau of Investigation director: John Pistole, a former TSA administrator who previously served as Federal Bureau of Investigation deputy director, and Chris Wray, a former Justice Department official who served during the George W. Bush administration.
Spicer deflected a reporter's questions about the Post's article, refusing to confirm or comment on its allegations. "I guess the key question is to what extent, over what period of time", he said. "They get along very well". "And yet the president did a great job at North Atlantic Treaty Organisation". "If the president has a decision on anything, we'll be sure to let you know". "I think he is learning to understand the European position", Cohn said during the G7 meetings last week. I haven't asked him.
The spokesman dismissed reports of an impending staff shake up, saying that President Trump is "very pleased" with the work of his aides and is merely "frustrated" with the spread of "fake news".
But in his discussion about "fake news", Spicer managed to get into a heated conversation with a journalist before cutting the press conference short, illustrating why the president is reportedly mulling limiting media briefings or, as he suggested to Jeanine Pirro in a Fox News interview, holding them himself.
"The problem is that I think the president, to the question, gets frustrated when he sees fake stories get published, things that aren't based on fact". He's held a handful of off-camera briefings since then, including some responding to news stories on the Russian Federation investigations.