On sensitive U.S. stopover, Taiwan leader connects to Twitter

By Jane Lanhee Lee SAN FRANCISCO (Reuters) - Taiwan President Tsai Ing-wen, carving a careful diplomatic path on her stopovers in the United States, visited the headquarters of micro-messaging service Twitter Inc and opened her official account on Saturday. A source with knowledge of the president's travel through San Francisco told Reuters she met with the "head of Twitter" but declined to confirm if that person was CEO and co-founder Jack Dorsey. The source, who spoke on the condition of anony