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 put 25% tariffs on goods from Canada and Mexico on Tuesday. Markets tanked. And by Thursday, he had decided to broadly lift them.

Trump's sit-down interview came as his approval rating has taken a considerable hit, falling to 39% in a new poll from The Washington Post, ABC News and Ipsos, amid concerns about the economy and ...