The Trump administration is doubling down on its trade rhetoric, even as other countries ready tariffs on American goods and U.S. business groups part company with the president over his trade policies."The president is trying to fix long-term problems that should have been dealt with long time ago [and] weren't, and there obviously is going to be some pulling and tugging as we try to deal with very serious problems. So there will be some hiccups along the way," Commerce Secretary Wilbur Ross told CNBC Monday.Ross was asked whether trade frictions were to blame for the lackluster performance of the U.S. stock market recently. The Dow Jones industrial average is down slightly for the year.The remarks came as tensions between the U.S. and its trading partners are ramping up, with tariff threats and counterthreats echoing through the global economy.Trump is preparing to impose tariffs on an additional $34 billion in Chinese imports on Friday, a move that China has promised to match.Over the weekend, Canada responded to U.S. tariffs on steel and aluminum by imposing tariffs on $12.6 billion worth of U.S. goods including coffee, whiskey and aluminum products.Meanwhile, the European Union released a statement warning that Trump's proposed tariffs on auto imports would harm the U.S. economy.As conflicts escalated, some major business lobbies that are usually among Trump's biggest supporters were pushing back.The U.S. Chamber of Commerce released an analysis of how tariffs would affect all 50 states. Among the states that are hardest hit are Washington, California and Ohio.In a statement, the chamber's CEO and president, Thomas Donohue, said: