“Everybody who hates Trump wants him to stay in Paris. Everybody who respects him, trusts him, voted for him, wishes for him to succeed wants him to pull out,” said Grover Norquist, an anti-tax activist who had earlier posted on Twitter the “Top 5 reasons USA should withdraw from Paris ‘climate’ debacle.”
Mr. Trump said on Twitter over the weekend that he would announce his decision this week, and White House officials said the president spoke again Tuesday with Mr. Pruitt, who is responsible for unwinding the pollution-reduction efforts the prior administration had put in place during the negotiations in Paris.
“He wants a fair deal for the American people,” Sean Spicer, the White House press secretary, said of Mr. Trump. “He will have an announcement on that shortly.”
Mr. Trump has given few public indications of his thinking. Inside the West Wing, advisers have believed for weeks that the president was inclined to do what he promised during the campaign: In rallies, he repeatedly vowed to “cancel” what he called the job-killing agreement.
Mr. Trump’s daughter, however, has spent the past several weeks making sure that her father has heard from both sides, according to an administration official familiar with her efforts.
Ms. Trump’s husband, Jared Kushner, a senior adviser in the White House, also favors staying as long as doing so does not legally limit the steps Mr. Trump is taking to move away from the restrictive environmental standards former President Barack Obama put in place.
On the other side, Mr. Bannon has been one of the most aggressive advisers lobbying the president to pull out of the agreement. Since the administration is already moving quickly to reverse the policies implemented to comply with the accord, staying in would be pointless, he argues, but would risk costing the president support from his core supporters.
Meanwhile, advice is pouring in from outside the White House — much of it unsolicited.
On Capitol Hill, 22 Republican senators signed a letter urging the president to abandon the agreement. Staying in “would subject the United States to significant litigation risk that could upend your administration’s ability to fulfill its goal of rescinding the Clean Power Plan,” they wrote.
Senator Lindsey Graham, Republican of South Carolina, chided his colleagues from his party, saying on CNN that pulling out of the Paris accord would amount to “a statement that climate change is not a problem, is not real.”
Democratic senators took to Twitter — Mr. Trump’s favorite communication medium — over the weekend to make their case.
But the corporate voices for remaining in the agreement may be the most influential. “By expanding markets for innovative clean technologies, the agreement generates jobs and economic growth. U.S. companies are well positioned to lead in these markets,” a host of corporate giants wrote in full-page advertisements that ran recently in The New York Times, The New York Post and The Wall Street Journal.
Mr. Woods, the Exxon Mobil chief executive, wrote to Mr. Trump this month after the two men spoke by phone about investments that the company was planning in the Gulf of Mexico, according to a company spokesman, Alan Jeffers. As disagreement over whether to withdraw appeared to intensify, Mr. Woods wanted to communicate his stance directly.
“By remaining a party to the Paris Agreement, the United States will maintain a seat at the negotiating table to ensure a level playing field so that all energy sources and technologies are treated equitably in an open, transparent and competitive global market so as to achieve economic growth and poverty reduction at the lowest cost to society,” Mr. Woods wrote.
He included an earlier letter that the company had sent expressing support for the agreement to George David Banks, the special assistant to the president for international energy and environment, who had asked the company to share its views.
Environmentally oriented groups like Ceres, the Business Council for Sustainable Energy and the Center for Climate and Energy Solutions have brought together big companies like Apple, Ingersoll Rand, Mars, National Grid and Schneider Electric to appeal to the president to stay in. Many of them operate globally and worry that if the United States abandons the deal, it would be harder to operate in existing markets and break into new ones.
“It’s the right thing — we finally had a workable framework,” said Stephen Harper, global director of environment, energy and sustainability policy for Intel, who has attended several of the global climate meetings. “More than half of our market is outside the United States — our biggest market right now is China.”
Tom Werner, the chief executive of SunPower, a solar panel maker, sent letters to Mr. Trump and other administration officials arguing that companies have already made plans based on the Paris standards.
“It was important to speak up,” he said.
The global reaction has been fierce and almost exclusively in favor of keeping the United States in the 2015 agreement. In Europe last week, world leaders privately implored Mr. Trump not to bolt.
President Emmanuel Macron of France told reporters that he urged Mr. Trump not to make a “hasty decision.” Chancellor Angela Merkel of German called her discussions with the president “very difficult, if not to say very dissatisfying.”
The global pressure campaign continued on Tuesday with the speech by Mr. Guterres at New York University. While not specifically mentioning Mr. Trump in his speech, the secretary general of the United Nations referred to “those who might hold divergent perspectives” as he called for every country to implement the promises they made. After the speech, in answer to a question from the audience, Mr. Guterres said he hoped that the United States would stick to the deal, or that American businesses would if the government did not.
“It is absolutely essential that the world implements the Paris Agreement — and that we fulfill that duty with increased ambition,” Mr. Guterres said. “The real danger is not the threat to one’s economy that comes from acting. It is, instead, the risk to one’s economy by failing to act.”
In the end, Mr. Trump’s decision may be influenced by voices closer to home. Critics of the pact said they hoped Mr. Trump would think less about world leaders and more about his voters.
“This is a huge deal to speak to the people who brung you to the dance,” Mr. Norquist said. The message if Mr. Trump pulls out of the Paris Agreement, he said: “I kept my word.”