Senate control will decide the next appointments to Spain's Constitutional Court

Four magistrate seats on Spain's Constitutional Court are unfilled after a magistrate's death and the end of three nine-year terms, including that of the court's president. The Senate alone can select these judges, but the law demands a three-fifths vote, encouraging parties to seek broader support. Both left-leaning and right-leaning blocs are intensifying their campaigns to secure a Senate majority that would let them nominate candidates aligned with their ideological blocks.

The PSOE and Frente Amplio have announced a joint Senate list to boost their numbers, while the PP and Vox are discussing a pact that could involve Vox abstaining in key provinces to avoid splitting the right-wing vote. The outcome will shape the court's balance between conservative and progressive magistrates.