President Xi Jinping, China's most powerful leader in decades, increased his dominance when he was named Sunday to another term as head of the ruling Communist Party in a break with tradition and promoted allies who support his vision of tighter control over society and the struggling economy. Xi, who took power in 2012, was awarded a third five-year term as general secretary, discarding a party custom under which his predecessor left after 10 years. The 69-year-old leader is expected by some to try to stay in power for life.