Tariffs have emerged as possibly the defining aspect of Donald Trump's presidency and they're poised to make life a lot harder.

Newsweek has contacted the White House and the Chinese Foreign Ministry for comment. President Donald Trump raised U.S. tariffs on China to a combined 145 percent, prompting the Chinese to retaliate with a 125 percent levy on American imports.

President Donald Trump remains firm that the United States is not going to unilaterally reduce tariffs on Chinese goods without concessions from China, the White House said on Friday, hours after Trump floated the idea of reducing the current rate of 145% down to 80% as the two sides prepare for talks between in Switzerland.