Just before Easter, as European diplomats were packing for the holidays, a crisis erupted in the forgotten and usually quiet Moldova that will require their intervention to sort out. Without a quick political solution, the European Union could face a new consolidated autocracy like Belarus on its border. Relations with Russia would deteriorate further and the launch of the eastern partnership initiative, under which the bloc aims to strengthen ties with six ex-Soviet states, would be undermined.

The trouble started two days after elections on April 5, which delivered a third straight victory to the Communist party. A minority of...