Trump's war on drug cartels could gain powerful new ally after pivotal election

EXCLUSIVE: Brazil could join the U.S.-led effort to combat drug cartels if presidential candidate Flávio Bolsonaro wins the country’s Oct. 25 runoff election, according to his brother, Brazilian politician Eduardo Bolsonaro.

The initiative, known as the Shield of the Americas, is designed to expand security cooperation among countries in the Western Hemisphere, including intelligence sharing, military coordination and joint efforts to disrupt cartel financing.

The coalition follows...