Zambia's ruling party supporters celebrate during the announcement of the results at Mulungushi International Center in Lusaka

LUSAKA, Zambia (AP) -- A veteran ruling party member was sworn in as the new president of Zambia Sunday promising to continue the free-market policies of a government that greatly expanded trade between China and one of the world's top copper producers.

His populist opposition rival, who had warned against foreign exploitation and promised to emphasize social