Michael Pillsbury, a China scholar at the Hudson Institute who advises Mr. Trump, said that Mr. Trump’s campaign advisers have realized that the president’s supporters are less concerned about China’s record of human rights abuses or fears that it is an existential threat and more interested in having greater access to its market.

Michael Pillsbury, a China scholar at the Hudson Institute who advises the Trump administration, said translating the text of the agreement has been complicated because the United States wants to ensure that the commitments are legally binding rather than just statements of what China’s intends.

Michael Pillsbury, a China scholar at the Hudson Institute who advises the White House on trade, said that he had spoken to the president on Thursday afternoon about the agreement.

With pressure growing, administration officials have weighed a variety of options. Michael Pillsbury, a Hudson Institute scholar who advises Mr. Trump, drafted a memo that has been circulated to the White House outlining possible actions.

Michael Pillsbury, a China expert at the conservative Hudson Institute with close ties to the Trump administration, said that Mr. Trump could blunt the measure’s impact on the trade talks by delaying his signature until after such a deal is reached.

“There’s an ongoing debate in Beijing between reformers who would like phase one and hard-liners who see themselves surrounded by hostile forces led by the United States, including in Hong Kong,” said Michael Pillsbury, a China scholar at the Hudson Institute who advises the Trump administration.