ATHENS—Greece’s opposition conservatives returned to power with a landslide victory in snap elections on Sunday, and Prime Minister elect Kyriakos Mitsotakis said he had a clear mandate for change, pledging more investments and fewer taxes.
The win appeared driven by fatigue with years of European Union-enforced belt-tightening, combined with high unemployment, after the country almost crashed out of the euro zone at the height of its financial travails in 2015.