Trump earlier told a U.N. Security Council meeting on nonproliferation of weapons of mass destruction that China was trying to interfere in the upcoming mid-term elections, without providing any evidence.
The Chinese Foreign Minister Wang Yi immediately rejected Trump's accusation, saying "We do not and will not interfere".
"China has been attempting to interfere in our upcoming 2018 election, coming up in November", he told a UN Security Council meeting.
Washington, Sep 26 (AFP) Chinese government interference in United States politics, media and business has reached an "unacceptable level", a White House official said Wednesday.
China "did not and will not interfere with any country's domestic affairs", Mr. Wang said.
While Russia's role in manipulating the 2016 election in Trump's favor is the subject of the special counsel's investigation, until recently there were no allegations of Chinese political meddling.
Trump later told reporters at the United Nations' General Assembly meeting in NY that China is attacking the "farm belt" with ads and with statements. Des Moines is the capital of Iowa, a state Trump won handily in the 2016 election, and where the farming community has been especially hard hit by the U.S. Mr. Trump's own national security leaders have said Russian Federation continues its interference efforts ahead of the midterms, though they have said the activity is not occurring with the same intensity as it did in 2016. He then repeated the claim that "they [Chinese authorities] are trying to meddle in our elections and we're not going to let that happen just as we're not going to let that happen with Russian Federation".
Trump later tweeted pictures of a paid China Daily advertorial insert in the Des Moines Register, saying that "China is actually placing propaganda ads in the Des Moines Register and other papers, made to look like news".
On Tuesday, in remarks at The Citadel, a military college in South Carolina, Director of National Intelligence Daniel Coats said the Chinese government is "targeting USA, state and local governments and officials" and "trying to exploit any divisions between federal and local levels on policy".
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Thomas Rid, a Johns Hopkins cybersecurity expert, said, "I am not aware of any evidence of Chinese interference in the midterm elections".
Tough sanctions are due to kick in against Tehran in November, and Mr Trump warned there would be "severe consequences" for any nation that defied them.
From there, the president turned his attention to China.
Donald Trump has accused China of attempting to "interfere" in the U.S. midterm elections because they don't want him to win.
Also on Wednesday, a senior Trump administration official told reporters that China is trying to influence US public opinion."They employ a whole of government approach using political, economic, commercial, military and informational tools", said the official on the condition of anonymity, Reuters reported. A Chinese official said China can not hold talks on ending the trade dispute while the US "holds a knife" to Beijing's neck by hiking tariffs.
During a regular briefing in Beijing with reporters on Thursday, Foreign Ministry spokesman Geng Shuang echoed those remarks.
China has responded to Mr. Trump's tariffs by targeting higher duties on US farm exports, hitting especially hard at Mr. Trump's GOP base in Midwestern and southern states. Hard-liners in the ruling Communist Party have been eager to highlight the increasingly harsh rhetoric from Trump and his aides as evidence that the United States is seeking to punish China. He described China's actions as retaliation for his decision to challenge them on trade policy. But he said United States agencies were actively monitoring the situation ahead of the vote.
Trump said the world has been "rightly focused on the dangers of nuclear weapons" but he urged leaders to "never forget the threats posed by biological and weapons".