The first ever US tariffs aimed just at China will likely rally Trump's voters who agree with his "America First" argument that Beijing hasn't played fair for years, stealing America's intellectual property and undercutting its manufacturers. 'Largest trade war in economic history' But the risk is that a spiralling conflict undermines economic growth by gumming up international supply chains and inflicting higher prices on companies and consumers. The Federal Reserve has already noted some firms are slowing investment, while Harley-Davidson and General Motors are warning they may cut jobs. Given the moves were widely telegraphed, financial markets took them in stride. US stocks rose and the dollar extended losses. US Treasuries gained and gold declined as investors assessed the impact of the escalation in the trade rift. Hours after the tariffs, the US released jobs figures that showed few signs of any early pressures on employment from the trade tension. US hiring topped forecasts in June, while the unemployment rate rose from an 18-year low and wage gains unexpectedly slowed.

The June jobs data show no evidence of trade fears hurting the US economy, Council of Economic Advisers Chairman Kevin Hassett said in an interview on Friday. "There isn't clear evidence in the data that the anxiety over trade is being harmful to the industries that we would most watch for harm in," Hassett said. Loading The extent of the economic damage will depend on how far both sides go. If the US and China cool off after a first round of tariffs, the fallout will be modest, according to Bloomberg Economics. Under a full-blown trade war in which the US slaps 10 per cent tariffs on all other countries and they respond, the economists reckon US growth would slow by 0.8 percentage point by 2020. Trump has already imposed duties on foreign steel and aluminium imports, drawing a response from the European Union and Canada which fret he may go after automakers next.

"Our view is that trade war is never a solution," Chinese Premier Li Keqiang told reporters during a trip to Bulgaria. "No one will emerge as a winner from trade war, it benefits no one." Tariffs on Teslas The US runs a bilateral trade deficit of $US336 billion with China and imports much more from it than the reverse, giving it an early advantage. Trump has declared trade wars as "easy to win" and bet the skirmish will prompt American companies to return operations to the US. In the first round though, the additional Chinese duties on US goods will have a significant impact on some items, risking lower sales. For instance, the tariff on pure-electric vehicles, such as Tesla, will rise to 40 per cent of the value from the current 15 per cent. US whiskey will be taxed 30 per cent, compared with 5 per cent for alcohol from other nations. US soybeans, a key flash-point in the worsening trade relations, will see their tariff jumping to 28 per cent of the value, while the soybean duty for some other nations has been lowered to zero recently.

China also has other ways to retaliate by going after US companies such as Apple and Walmart, which operate in its market and are keen to expand. It could introduce penalties such as customs delays, tax audits and increased regulatory scrutiny, while more drastic steps include devaluing the yuan or paring $US1.2 trillion holdings of US Treasuries. Beijing has shown little interest in making fundamental changes to its economic model. President Xi Jinping has balked at US demands to stop subsidising Chinese firms under his plan to make the nation a leader in key technologies by 2025. Bundles of steel pipe sit stacked at a stockyard on the outskirts of Shanghai, China. Trump’s attempts to re-balance global trade have already sent the metals world into a tizzy, and the disarray is set to increase. Credit:Bloomberg The strength and size of both economies means the fight could rage on for years. In the past, the US used its clout to win trade skirmishes with developing countries, said James Boughton, a senior fellow at the Centre for International Governance Innovation in Waterloo, Ontario.

China, whose economy has grown tenfold since it joined the World Trade Organization in 2001, poses a much more formidable adversary. "The dynamic is different from anything we've seen," Boughton said. "China has an ability to ride out this kind of pressure, to weather the storm, that a lot of countries didn't have in the past." On Friday, Trump was uncharacteristically reserved on Twitter about the trade dispute with China. "JOBS, JOBS, JOBS!" he tweeted after the employment numbers. Bloomberg