WASHINGTON (NYTIMES) - The United States and China have agreed that an initial trade deal between the two countries would roll back a portion of the tariffs placed on each other's products, a significant step towards defusing tensions between the world's largest economies.

The agreement has not yet been completed, and a deal could fail to materialise as it has in previous rounds of negotiations. But if a pact is reached, the Trump administration has committed to cutting some tariffs, according to a US official and other people with knowledge of the negotiations.

This is the first time the administration has agreed to remove any of the tariffs it has placed on US$360 billion (S$489 billion) worth of Chinese goods. While President Donald Trump cancelled a planned tariff increase in October, he has routinely dangled the prospect of additional taxes if Beijing does not accede to US trade demands.

A deal that includes reversing even some tariffs creates a political dilemma for Mr Trump, a self-avowed "tariff man" who has used levies to punish China for trade practices that have helped hollow out US manufacturing and to press Beijing to change its economic practices.

But stock markets, which Mr Trump sees as an economic barometer of his presidency, do not share his affinity for tariffs, and have been steadily rising with hope for a deal. Many businesses and farmers, which are struggling under the weight of the President's trade war, are also eager for a deal.

White House economic adviser Larry Kudlow on Thursday (Nov 7) confirmed the advance in negotiations.

"If there's a phase one trade deal, there are going to be tariff agreements and concessions," he told Bloomberg.

Ms Kellyanne Conway, senior White House adviser, also said President Donald Trump is "anxious" to sign the deal. The negotiations are ongoing and a time or place for any signing of a pact is yet to be determined.

However, White House trade adviser Peter Navarro told Fox Business: "There is no agreement at this time to remove any of the existing tariffs as a condition of the phase one deal. The only person who can make that decision is President Donald J. Trump. It's as simple as that."

Supporters say an agreement that rolls back only some tariffs would constitute a political victory for the President, who can claim he forced China to open its markets and buy more American agricultural goods while retaining leverage in future negotiations.

But Mr Trump faces internal divisions, with his more hawkish advisers warning that removing tariffs without more substantial commitments from China to end its problematic behaviour will do little to resolve US concerns and amount to a capitulation.

"President Trump's tariffs are the centerpiece of his confrontation with the Chinese Communist Party - and they have worked brilliantly, forcing the Chinese to the table," said Mr Steve Bannon, the President's former chief strategist.

"Now, China is trying to re-trade the president and remove the tariffs."

Mr Trump and his Chinese counterpart, Mr Xi Jinping, are facing increasing political and economic pressure to resolve their 19-month trade fight, which has inflicted pain on both sides. Mr Trump is heading into a reelection campaign as the US economy begins to slow and as key political constituencies, like farmers and manufacturers, continue to suffer from lost sales to China.

His next round of tariffs planned for Dec 15 would inflict further pain on consumers and businesses by increasing taxes on products like cellphones, laptops, toys and apparel.

Investors have already begun viewing a resolution as a given. For months stocks had ping-ponged in a tight range, buffeted by each twist and turn. But the S&P 500 found its footing last month, after the White House announced that the two economic giants had agreed to the rough outlines of this so-called phase one deal. The S&P 500 has risen 5 per cent in the weeks since, reaching a record high on Oct 28 and continuing to climb.

Stocks soared again on Thursday after the Chinese government said Beijing and the Trump administration had agreed to remove some tariffs as part of any deal. The S&P 500 closed at a record high of 3,085.18. Shares of companies with close ties to China's vast manufacturing base, like semiconductor manufacturers and retailers, also rose.

Mr Trump took notice in a tweet on Thursday morning, saying "Stock market up big today. A New Record. Enjoy!"

China has its own political considerations, including ensuring that any deal does not seem like a giveaway to the US. Mr Gao Feng, a spokesman for China's Commerce Ministry, said at his weekly news conference in Beijing on Thursday that China was insisting any deal include tariff reductions and that the US had agreed.

"In the past two weeks, the leaders of the two sides have conducted a serious and constructive discussion on properly addressing the concerns of both sides, and agreed to cancel the tariffs by stages in accordance with the development of the agreement," he said.

Mr Gao did not specify what tariffs might be dropped, or when.

Last month, Mr Trump announced that the two sides had reached a preliminary trade deal that would involve Beijing buying more farm goods and opening its markets and that he would cancel an Oct 15 tariff increase. His advisers said they would most likely forgo a December round of tariffs if all went well. But they made no mention of the levies Mr Trump had already placed on more than US$360 billion of Chinese products, including those imposed on Sept 1 in response to China's retaliatory tariffs.

Since then, US officials have discussed rolling back those September levies on more than US$100 billion of Chinese food, clothing, lawn mowers and other products, according to people briefed on the discussions.

While markets are booming, consumer spending could begin to slump as tariffs hit household goods. And the farm and manufacturing states that supported Mr Trump in 2016 continue to feel the pinch of his trade war. That is problematic for the President as he campaigns for reelection.

The fight has brought the economies of several farm belt states to a near standstill, data released by the Commerce Department on Thursday showed. From the middle of 2018 through the middle of this year, growth in Iowa, Kansas and Nebraska slowed to less than 1 per cent for the year, well below the more rapid expansions they had enjoyed in the first half of 2018.

In the second quarter of this year, which ran from April to June, gross domestic product rose by an annual rate of just 1.1 per cent in Wisconsin, Michigan, Iowa, Illinois and Georgia. GDP grew by just 1 per cent in Indiana and Kentucky.

US tariffs now cover more than two-thirds of the products imported from China, while Chinese tariffs cover 58 per cent of China's imports from the US, according to tracking by Dr Chad Bown, a senior fellow at the Peterson Institute for International Economics.

While the Trump administration has insisted that Americans are not paying the tariffs, business and farmers' groups say economic data shows otherwise.

The lobbying group Tariffs Hurt the Heartland, in a report released this week, found that US consumers and businesses have paid an additional US$38 billion in tariffs between February 2018 and September 2019.

"This data offers concrete proof that tariffs are taxes paid by American businesses, farmers and consumers - not by China," said Mr Jonathan Gold, spokesman for Americans for Free Trade. "This is why removing tariffs must be a part of the phase one deal."

Dr Mary E. Lovely, a senior fellow at the Peterson Institute for International Economics, said the tariffs that went into effect in September and are planned for December affect products made by American companies or their affiliates that employ large American work forces, despite manufacturing some products in China.

"Politically and economically, they make no sense," Dr Lovely said. "Does it really make sense to put tariffs on foreign-owned factories in China that are producing products that are designed by and supporting employment in the United States?"

US officials have emphasised that any deal depends on China taking more aggressive action to protect American intellectual property, and that Mr Trump would make the final determination. If China doesn't agree to the terms Mr Trump likes, he could ultimately leave all tariffs in place or remove only a small portion.

"There is a difference between an ambiguous stage-by-stage tariff reduction agreement versus a specific list of which tariffs will be with withdrawn for what Chinese actions," said Dr Michael Pillsbury, a China scholar at the Hudson Institute who advises the White House.

"Neither the Chinese nor the White House has developed a specific list or a series of quid pro quo - yet. That is the next task."

Mr Gao's statement that China would insist on cancelling some tariffs was a subtle shift from his previous comments, which were somewhat less specific on what China required for an interim agreement.

"If China and the United States reach the first-phase agreement, according to the content of the agreement both sides should cancel added tariffs at the same time with the same proportion," he said. "This is an important condition for reaching an agreement."

Those were the first official comments on the trade war since a meeting of the Chinese Communist Party's Central Committee concluded a week ago, the first such gathering in 20 months. In the past, Beijing's position has shifted away from compromise after a broader array of Communist Party officials were briefed on progress in the trade talks.

The US and China were close to a deal in early May but when the draft agreement was broadly distributed within the Chinese leadership, its contents provoked worries about the extent of China's concessions. China's trade negotiators quickly demanded extensive changes in the agreement and talks collapsed.