Serbia on EU path seeks to improve ties with Moscow, PM says

By Aleksandar Vasovic and Ivana SekularacBELGRADE (Reuters) - Serbia is committed to European Union membership but it will work hard to improve relations with its traditional ally Russia, Prime Minister Aleksandar Vucic told Reuters ahead of a presidential election on Sunday.    The poll will test the popularity of Vucic, a frontrunner in the race, as well as his center-right Serbian Progressive Party, economic reforms and a bid to bring the country closer to the EU."Serbia i