At a meeting of the Group of Seven in Sicily this week, German Chancellor Angela Merkel indicated that Trump's G7 peers lobbied him hard on the issue of climate change.
"There is one open question, which is the US position on the Paris climate accords", Italian Prime Minister Paolo Gentiloni said at the Group of Seven summit in Italy on Friday.
"It would be taken as a statement that climate change is not a problem; is not real", he continued.
Trump tweeted he would decide on Paris next week.
On Saturday night, Axios reported the news based on "three sources with direct knowledge". Saudi investment in USA arms and cooperation on terrorism seem to have led to a change of heart, and he was more comfortable with King Salman and other Arab leaders like Egypt's el-Sisi than with the likes of Angela Merkel later in the trip.
During the campaign Trump repeatedly promised that the United States would withdraw from the agreement if he was elected, but tweeted Saturday that he will make a decision on the matter this week.
If the USA pulls out of the Paris deal, it would become the largest producer of greenhouse gas emissions not included in the agreement, according to EPA data. Trump has flip-flopped on campaign promises before, and, as Axios noted, he spent a lot of time on his recent trip with his daughter Ivanka and her husband Jared Kushner, who are both advocates of the agreement.
In order to do that, countries pledged to reduce their carbon emissions.
Graham is among a group of Republicans to openly accept that human activity is a primary contributor to climate change, and has advocated for an expansion of the clean energy industry in the U.S.
Trump's chief economic adviser, Gary Cohn, told reporters at the G-7 summit Friday that the president was growing more attuned to the European stance on climate change.