Trump proposed to lower tariffs on Chinese imports to 80% from 145% on eve of negotiations with the country's third-largest trading partner.

Long-threatened tariffs from U.S. President Donald Trump have plunged the country into trade wars abroad — all while on-again, off-again new levies continue to escalate uncertainty. Trump is no stranger to tariffs.

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