* Trump expresses regret over latest trade salvo at China
* White House says regret is that he did not raise tariffs more
* Trump says he is not planning to demand firms leave China now (Recasts first paragraph; edits throughout)
By Jeff Mason
BIARRITZ, France, Aug 25 (Reuters) - President Donald Trump wishes he had raised tariffs on Chinese goods even higher last week, the White House said on Sunday, even as Trump signaled he did not plan to follow through with a demand that U.S. firms find ways to close operations in China.
Trump raised eyebrows on the sidelines of a G7 summit when he responded in the affirmative to questions from reporters on whether he had any second thoughts about raising tariffs on Chinese goods by 5%.
"President Trump responded in the affirmative - because he regrets not raising the tariffs higher," White House spokeswoman Stephanie Grisham said in a statement afterward that sought to clarify the president's remarks.
Trump announced the additional duty on some $550 billion in targeted Chinese goods on Friday, hours after China unveiled retaliatory tariffs on $75 billion worth of U.S. goods.
The move was the latest round in a tit-for-tat trade war between the world's two largest economies that has damaged global growth, upset allies, and raised market fears that the world economy will tip into a recession.
It came just hours after Trump said he was ordering U.S. companies to find "alternatives" to China, including closing operations there and moving production to the United States.
U.S. Treasury Secretary Steven Mnuchin said Trump could order companies out of China under the International Emergency Economic Powers Act if he declared a national emergency.
Trump indicated on Sunday that he was not planning such a step at this time, however.
"I could declare a national emergency. I think when they steal and take out, and -- intellectual property theft, anywhere from $300 billion to $500 billion a year, and where we have a total loss of almost a trillion dollars a year ... in many ways, that's an emergency," he said.
"I have no plan right now. Actually, we're getting along very well with China right now. We're talking," Trump said.
Mnuchin said the president did want U.S. businesses to start looking to shift investments away from China, saying they would be better off in the event the U.S.-China trade war lasted for a long time.
"We want them to be in places where they're trading partners that respect us and trade with us fairly," he said on the "Fox News Sunday" program.
During his meeting with Johnson on Sunday in France, Trump was asked if he had second thoughts about his latest escalation.
"Yeah, sure. Why not?" he said.
The reporter repeated the question and Trump replied: "Might as well. Might as well."
A second reporter followed up again, asking if he had second thoughts about escalating the trade war with China.
"I have second thoughts about everything," Trump responded.
Asked to clarify Trump's remarks, Mnuchin, who is one of the lead U.S. negotiators in trade talks with Beijing, said Trump remained resolute in trying to force concessions from China.
Another top official said he did not think Beijing would retaliate for the latest increase in tariffs.
"I think his was an action to respond to their action. So I doubt whether they're going to take another step," White House economic adviser Larry Kudlow said on CBS' "Face the Nation" program. "We'll have to wait and see."
Mnuchin said Trump and Chinese President Xi Jinping were now "enemies" on trade, despite an otherwise good relationship.
"President Xi is still his friend," he said. "But as it relates to financial issues and trade, we have become enemies. We're not making progress." (Reporting by Jeff Mason in Biarritz; Additional reporting by David Morgan and Ginger Gibson in Washington; Editing by Toby Chopra, Tim Ahmann and Sonya Hepinstall)