BRASILIA — Brazil’s Senate ousted Dilma Rousseff as president Wednesday, voting overwhelmingly to impeach the leftist leader in the culmination of a protracted process that has divided the country. The vote to impeach Rousseff was 61 to 20. Two-thirds of senators — 54 out of 81 — were needed for impeachment to pass. Senators broke into cheering and applause after the electronic voting was announced and sang the national anthem, concluding a process that was given the go-ahead in December. But a second vote to strip Rousseff of her political rights for eight years fell well short of the required...