Taiwan will open the year that is likely to be seen as a political landmark by holding presidential and parliamentary elections on Jan. 14. The results may stiffen relations with mainland China and put the U.S. in an uneasy position between the two.President Ma Ying-jeou and his main opponent Tsai Ing-wen have been engaged in a tight race. A recent poll showed Tsai from the Democratic Progressive Party trailing Ma, who is running to win a second term, by 1 percentage point. If elected, Tsai will