An ally of billionaire Georgian Prime Minister Bidzina Ivanishvili was set to win a crushing first-round victory in a presidential poll to succeed Mikheil Saakashvili, an exit poll from privately-owned Rustavi 2 television station said Sunday. Giorgi Margvelashvili, a little-known academic from Ivanishvili’s Georgian Dream coalition, was on 66.7 percent of the vote in the ex-Soviet state, well ahead of former parliament speaker David Bakradze of Saakashvili’s United National Movement party on 20.2 percent, according to the exit poll.