More than three decades after Germany’s 1990 reunification, lasting east-west divisions may be thrown into stark relief at Sunday’s election in the eastern state of Saxony-Anhalt. The anti-immigration and Moscow-friendly Alternative for Germany (AfD) is expected to win big and even hopes to take power at the state level, which would be a first for a far-right party in German post-war history. As much of the east has become an AfD stronghold, the government’s commissioner for eastern Germany,...