"Trade war is never a solution", Chinese Premier Li Keqiang said at a news briefing with Bulgarian Prime Minister Boyko Borissov in Sofia before a summit with 16 central and easternEuropean countries.
Still, Heitkamp said "no one should be surprised by this" because "this is what (President Donald Trump) said he was going to do".
The U.S. Chamber of Commerce, which has come out against the Trump administration's trade policy, published a state-by-state analysis of what it says the effects of that policy will be.
He noted that of the US$34 billion worth of goods targeted, US$20 billion, or about 59 per cent, were produced by foreign companies, a significant proportion being United States firms.
Chinese authorities quickly retaliated with equivalent tariffs on $34 billion worth of imported USA goods - previously promised as ranging from vehicles to soybeans, beef and other agricultural products.
That hurts US soybean farmers and could also have an impact on makers of farm equipment, such as Deere & Co.
Besides the initial tariffs from the two largest economies, traders are anxious that the trade war could escalate further in the days to come.
"Its unruliness looks set to have a profoundly damaging impact on the global economic landscape in the coming decades, unless countries stand together to oppose it".
Moscow also announced Friday it had slapped 25 percent tariffs on some US goods, joining the global push-back against Trump's offensive.
The Labor Department said that US employers added 213,000 jobs in June.
The tariffs will make trade more expensive and complicated, and consumers will end up paying a price, Wilson said. Mr Trump has indicated he's examining leaving the WTO altogether.
The back-and-forth trade battle between the world's two largest economies will likely be damaging to the USA economy according to trade experts, ths fact was not lost on the Chinese.
Just hours after the United States introduced 25 percent trade tariffs on $34 billion worth of Chinese goods, Beijing has retaliated with mirror measures against American imports.
Early on Friday, China's Commerce Ministry accused the United States of launching the "largest trade war in economic history", and said it could trigger "global market turmoil".
China says its tariffs on USA goods will take effect immediately after Washington's tariffs on Chinese goods kick in.
In China the impact of the dispute is harder to discern, with the sharp fall in the value of the renminbi and the 10 per cent decline in the Shanghai stock market over the past few weeks at this stage probably attributable more to domestic issues - the authorities' attempt to reduce leverage in their financial system - than to the trade dispute.
There was no evidence of any last-minute negotiations between US and Chinese officials, business sources in Washington and Beijing said. Hong Kong's Hang Seng Index fell 0.63%, and Japan's Nikkei 225 plummeted 0.78%. This allows Washington to take unilateral action when it determines that a trading partner has engaged in unfair practices. "We are un-willing to fight, but in order to safeguard the interests of the country and the people, we have to fight if necessary".
In the weeks since the US leveled tariffs on steel and aluminum - which the European Union called illegal - Mexico retaliated with levies of 15 percent to 25 percent on USA agricultural products; Canada imposed tariffs on almost $13 billion of US goods; and the European Union hit back with its own 25 percent tariff on distinctively American products ranging from bourbon to Harley-Davidson motorcycles.