MANILA, Philippines — Sen. Raffy Tulfo and former senator Grace Poe emerged as the top choices in the latest Tangere senatorial preference survey for the 2028 elections after three previous frontrunners were excluded from the poll.Tulfo ranked first with 39.9 percent, followed by Poe with 36.7 percent, according to the noncommissioned survey conducted by market research and opinion polling firm Tangere from Sept. 10 to 14.Former senator Manny Pa…