Republican Donald Trump's return to the presidency is expected to precipitate a shift in the U.S. government's legal stance in major cases pending at the Supreme Court, including a closely watched dispute involving Tennessee's ban on gender-affirming medical care for transgender minors.

Police have identified the man who killed himself in a blast outside Brazil's Supreme Court on Wednesday night as a former city council candidate from ex-President Jair Bolsonaro's right-wing party with a history of heated political rhetoric online.

The authorities were treating the blasts in Brasília, the capital, as the work of a lone bomber, who was believed to have been the person killed.