SOFIA, Bulgaria (AP) — Bulgarians on Sunday cast their ballots in a general election — the fourth in 18 months — marked by a raging war nearby, political instability, and economic hardships in the European Union’s poorest member. Surveys before the vote suggest that up to eight parties could muster the 4% threshold to enter a fragmented parliament where populist and pro-Russia groups could increase their representation. Turnout is expected to be low because of voter apathy and disillusionment with politicians unable to cobble together a viable government coalition.