Dutch voters handed pro-European parties a sweeping election victory on Wednesday, shunning the radical fringes and dispelling concerns that eurosceptics could gain sway in a core eurozone country. ... The hard-left Socialists, who oppose austerity and eurozone bailouts, finished a distant third and gained no ground, while the far-right anti-immigration Freedom Party of Geert Wilders, who campaigned to leave the euro and the European Union, slumped and was set to lose about a third of its seats.