WASHINGTON (Reuters) - U.S. President Donald Trump said on Tuesday he would intervene with the U.S. Justice Department in the case against a Chinese telecommunications executive if it would help secure a trade deal with Beijing.

U.S. President Donald Trump sits for an exclusive interview with Reuters journalists Roberta Rampton, Jeff Mason and Steve Holland as White House Communications Director Bill Shine (R) looks on in the Oval Office at the White House in Washington, U.S. December 11, 2018. REUTERS/Jonathan Ernst

“If I think it’s good for the country, if I think it’s good for what will be certainly the largest trade deal ever made – which is a very important thing – what’s good for national security – I would certainly intervene if I thought it was necessary,” Trump said in a wide-ranging interview with Reuters in the Oval Office.

Trump expressed optimism that he could strike a trade deal with Chinese President Xi Jinping as the two countries struggle to resolve a dispute that has contributed to recent U.S. stock market declines and raised questions about whether economic turmoil could beset the president in the new year.

At the request of U.S. authorities, Huawei Technologies Co. executive Meng Wanzhou was arrested earlier this month in Vancouver on charges of violating U.S. sanctions against Iran.

The arrest came the same day Trump and Xi declared a 90-day truce in their trade war during summit talks in Buenos Aires.

Trump, who wants China to open up its markets to more American-made products and stop what Washington calls the theft of intellectual property, said he had not yet spoken to Xi about the case against Huawei’s executive.

Over the course of the 30-minute interview, Trump also addressed the controversy surrounding the Oct. 2 killing of journalist Jamal Khashoggi, saying he stood firmly beside Saudi Crown Prince Mohammed bin Salman despite accusations that he was the mastermind of it.

Trump refused to comment on whether the crown prince was complicit in the murder, but he provided perhaps his most explicit show of support for MbS, as the prince is known, since Khashoggi’s death more than two months ago.

“He’s the leader of Saudi Arabia. They’ve been a very good ally,” Trump said. Asked if standing beside Saudi Arabia means also standing by the crown prince, Trump said, “Well, at this moment, it certainly does.”

While Trump has condemned the murder of Khashoggi, a U.S. resident and Washington Post columnist who was often critical of MbS, he has given the benefit of the doubt to the prince with whom he has cultivated a deep relationship.

Trump again reiterated on Tuesday that MbS “vehemently denies” involvement in a killing that has sparked outrage around the world.

Despite Trump’s desire to maintain close ties to Saudi Arabia, several of his fellow Republicans have joined Democrats in blaming the crown prince for Khashoggi’s death and backing legislation to respond by ending U.S. support for the Saudi-led war effort in Yemen, imposing new sanctions and stopping weapons sales.

Last month, the CIA assessed that MbS ordered the killing.

CHINA TRADE TALKS UNDERWAY

In the wake of his meeting with Xi in Buenos Aires, Trump said during the interview that trade talks with Beijing were under way by telephone, with more meetings likely among U.S. and Chinese officials.

He said the Chinese government was once again buying large quantities of U.S. soybeans, a reversal after China in July imposed tariffs on U.S. supplies of the oilseed in retaliation for U.S. duties on Chinese goods.

“I just heard today that they’re buying tremendous amounts of soybeans. They are starting, just starting now,” Trump said.

Commodity traders in Chicago, however, said they have seen no evidence of a resumption of soybean purchases by China, which last year bought about 60 percent of U.S. soybean exports in deals valued at more than $12 billion.

Already fraught, relations between the United States and China have been further complicated by the arrest of Meng, 46. She faces U.S. accusations she misled multinational banks about Huawei’s control of a company operating in Iran, putting the banks at risk of violating U.S. sanctions and incurring severe penalties, court documents said.

If extradited to the United States, Meng would face charges of conspiracy to defraud multiple financial institutions. A Canadian court on Tuesday granted Meng bail while she awaits an extradition hearing

Trump has intervened on behalf of a Chinese company before. Earlier this year he revisited penalties for Chinese company ZTE Corp for lying to the U.S. after the company pleaded guilty to violating U.S. sanctions on trade with Iran, saying the telecom maker is a big buyer for U.S. suppliers.

Trump said Meng could potentially be released.

“Well, it’s possible that a lot of different things could happen. It’s also possible it will be a part of negotiations. But we’ll speak to the Justice Department, we’ll speak to them, we’ll get a lot of people involved,” he said.

Asked if he would like to see Meng extradited to the United States, Trump said he wanted to first see what the Chinese request. He added, however, that Huawei’s alleged practices are troubling.

“This has been a big problem that we’ve had in so many different ways with so many companies from China and from other places,” he said.

On the domestic front, Trump waved off concerns that he could face the possibility of impeachment when Democrats, intent on greater oversight of the president, take command of the U.S. House of Representatives in January.

“It’s hard to impeach somebody who hasn’t done anything wrong and who’s created the greatest economy in the history of our country,” he said. “I think people would revolt if that happened.”

Trump said the accusations in the probe on whether his campaign colluded with Russia in 2016 amounted to “peanut stuff.” Payments that he allegedly made to an adult film actress and a former Playboy model through then-lawyer Michael Cohen were not a violation of campaign finance law, he added.

“Michael Cohen is a lawyer. I assumed he would know what he’s doing. You rely on somebody. Hey, he was a lawyer. Number one: it wasn’t a campaign contribution. If it were, it’s only civil. And even if it’s only civil, there was no violation based on what we did,” Trump said.