WASHINGTON (AP) — President-elect Donald Trump has selected former Sen. David Perdue of Georgia to be the U.S. ambassador to China, leaning on a former business executive turned politician to serve as the administration's envoy to America's most potent economic and military adversary.

Trump said in a social media post Thursday that Perdue “brings valuable expertise to help build our relationship with China.”

Perdue lost his Senate seat to Democrat Jon Ossoff four years ago and ran unsuccessfully in a 2022 primary against Georgia Gov. Brian Kemp. Perdue pushed Trump’s debunked lies about electoral fraud during his failed bid for Georgia governor.

During his time in the Senate, Perdue was labeled as “anti-China” in a 2019 Chinese think tank report. The former Georgia lawmaker advocated for a more robust naval force to cope with threats, including from China.

Before launching his political career, Perdue held a string of top executive positions, including at Sara Lee, Reebok and Dollar General.

Economic tensions will be a big part of the U.S.-China picture for the new administration.

Trump has threatened to impose sweeping new tariffs on Mexico, Canada and China as soon as he takes office as part of his effort to crack down on illegal immigration and drugs. He said he would impose a 25% tax on all products entering the country from Canada and Mexico, and an additional 10% tariff on goods from China, as one of his first executive orders.

The Chinese Embassy in Washington cautioned earlier this week that there will be losers on all sides if there is a trade war.

“China-US economic and trade cooperation is mutually beneficial in nature,” embassy spokesman Liu Pengyu posted on X. “No one will win a trade war or a #tariff war.” He added that China had taken steps in the last year to help stem drug trafficking.

In response to Perdue's nomination, Liu on Thursday night said in a statement that China “is ready to engage in dialogue, expand cooperation, and manage differences with the incoming US government so as to maintain stability in China-US relations to the benefits of the two countries and the world at large.”

It is unclear whether Trump will actually go through with the threats or if he is using them as a negotiating tactic.

The tariffs, if implemented, could dramatically raise prices for American consumers on everything from gas to automobiles to agricultural products. The U.S. is the largest importer of goods in the world, with Mexico, China and Canada its top three suppliers, according to the most recent U.S. Census data.

Perdue, if confirmed, will have to negotiate a difficult set of issues that goes beyond trade.

Washington and Beijing have long had deep differences on the support China has given to Russia during its war in Ukraine, human rights issues, technology and Taiwan, the self-ruled democracy that Beijing claims as its own.

Chinese President Xi Jinping said in a meeting with outgoing President Joe Biden last month that Beijing stood “ready to work with a new U.S. administration." But Xi also warned that a stable China-U.S. relationship was critical not only to the two nations but to the “future and destiny of humanity.”

“Make the wise choice,” Xi cautioned during his November meeting with Biden on the sidelines of an international summit in Peru. “Keep exploring the right way for two major countries to get along well with each other.”

Trump’s relationship with Xi started out well during his first term before becoming strained over disputes about trade and the origins of the COVID-19 pandemic.

Trump seems particularly focused on using tariffs as a pressure point on Xi, even threatening he would use tariffs as a cudgel to pressure Beijing to crack down on the production of materials used in making fentanyl in Mexico that is illegally sold in the United States.

A second Trump administration is expected to test U.S.-China relations even more than the Republican’s first term, when the U.S. imposed tariffs on more than $360 billion in Chinese products.

That brought Beijing to the negotiating table, and in 2020, the two sides signed a trade deal in which China committed to improve intellectual property rights and buy an extra $200 billion of American goods. A couple years later, a research group showed that China had bought essentially none of the goods it had promised.

Before Trump's return to power, many American companies, including Nike and eyewear retailer Warby Parker, had been diversifying their sourcing away from China. Shoe brand Steve Madden says it plans to cut imports from China by as much as 45% next year.

Trump also filled out more of his immigration team Thursday, as he promises mass deportations and border crackdowns.

He said he’s nominating former Border Patrol Chief Rodney Scott to head Customs and Border Protection. Scott, a career official, was appointed head of the border agency in January 2020 and enthusiastically embraced then-President Trump’s policies, particularly on building a U.S.-Mexico border wall. He was forced out by the Biden administration.

Trump also said he’d nominate Caleb Vitello as acting director of Immigration and Customs Enforcement, the agency that, among other things, arrests migrants in the U.S. illegally. Vitello is a career ICE official with more than 23 years in the agency and most recently has been the assistant director for firearms and tactical programs.

The president-elect named the head of the Border Patrol Union, Brandon Judd, as ambassador to Chile. Judd has been a longtime supporter of Trump’s, appearing with him during his visits to the U.S.-Mexico border, though he notably supported a Senate immigration bill championed by Biden that Trump sank in part because he didn’t want to give Democrats an election-year win on the issue.

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AP writer Didi Tang contributed reporting.