Chief strategist Steve Bannon supports an exit. "He didn't want to do anything to put the U.S.at a disadvantage", Cohn said. "But even if the U.S. government decides to leave the Paris agreement, it's very important for the USA societies as a whole, for the cities, the states, the companies, the business to remain engaged with the Paris agreement - so it is very clear that governments are not everything".
The Paris Agreement, which was signed in 2015 by 195 countries, states that the parties will act to limit global warming and greenhouse gas emissions.
He argued climate action was a sound security policy, warning of mass displacement from natural disasters or from refugees whose lands become unlivable.
The official is involved in preparing the meeting between top EU Council President Donald Tusk, Commission President Jean-Claude Juncker and Chinese Premier Li Keqiang but can not speak on the record because their meeting statement was not finalized. That promise helped rally supporters sharing his skepticism of global efforts to police USA carbon emissions.
His announcement came as a summit of G7 leaders in Sicily wrapped up in deadlock on the issue, with United States partners voicing frustration at the president's failure to commit to the deal aimed at stemming global warming.
Originally, the President had aimed to make a decision on Paris before arriving in Europe for his first summit talks with foreign leaders, but in mid-May the White House announced he was delaying a decision. "Climate solutions provide opportunities that are unmatchable", according to The Associated Press.
"The sustainability train has left the station", Guterres said. Such an assertion stands in defiance of broad scientific consensus.
Yet several key people, including Environmental Protection Agency Administrator Scott Pruitt have been told the decision has been made. "This means Americans have caused a large fraction of the warming", Jennifer Francis, a Rutgers University climate scientist, claims.
Once in power, Trump and Pruitt have moved to delay or roll back federal regulations limiting greenhouse gas emissions while pledging to revive long-struggling USA coal mines.
In a slightly more cautious report, CBS says the president is expected to withdraw from the accord, but has also has discussed with senior White House staff an effort to renegotiate the agreement with an eye to making its provisions less onerous to USA industry.
Trump refused to endorse the landmark climate change accord at a summit of the G7 group of wealthy nations on Saturday, saying he needed more time to decide, and promised an announcement this week. Most of the senators who signed are from states that depend on the continued burning of coal, oil and gas. For that reason, many sector observers see the Paris accord as a target for future presidential administrations to use for emissions regulations.
Exxon CEO Darren Woods wrote a personal letter to Trump earlier this month, urging him to stick to the deal.
Hundreds of high-profile businesses have spoken out in favor of the deal, including Apple, Google and Walmart.