Sanchez’s Socialist Party is trailing in opinion polls.
Housing affordability has become a central political issue.
The opposition People’s Party aims to increase homebuilding to 200,000 units per year.
Unions CCOO and UGT announced a one‑day strike to pressure the government.
The election could lead to a coalition involving the far‑right party Vox.
Spain’s economy remains strong despite political tensions.
The decision follows nationwide protests demanding affordable housing.
Opposition leader Alberto Feijoo pledged to double annual home construction and reduce taxes if his party wins.
Major labour unions plan a 24‑hour general strike to demand higher wages and better housing policies.
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