New Delhi, Aug. 6 -- U.S. President Donald Trump has made clear who his new Latin America priority is: former Brazilian President Jair Bolsonaro, a personal and political ally.

In doing so, he has damaged one of the Western hemisphere's most important and long-standing relationships, by levying 50% tariffs that begin to take effect Wednesday on the largest Latin America economy, sanctioning its main justice and bringing relations between the two countries to the lowest point in decades.

The White House has appeared to embrace a narrative pushed by Bolsonaro allies in the U.S., that the former Brazilian president's prosecution for attempting to overturn his 2022 election loss is part of a "deliberate breakdown in the rule of law," with t...