If Spanish economy is doing well, why is Sanchez poised to lose?

Outside observers may struggle to understand why although good economic news keeps rolling in, Spaniards seem to be unhappy with Pedro Sanchez, the socialist prime minister.

GDP growth is higher than the eurozone average; inflation is one of the lowest in the bloc, which has limited the hit of the war to businesses and consumers; and employment is at a record high. Even youth unemployment, traditionally the biggest headache for policymakers, seems to be falling.

To understand why...