Feijóo negotiates an agreement with Vox to shield the majority in the Senate: "It would be a mistake to facilitate control to Sanchismo"

The leader of the PP, Alberto Núñez Feijóo, has admitted that his party is negotiating an electoral agreement with Vox to secure the majority of the right-wing parties in the Senate after November 29th. "It would be a mistake to facilitate Sanchismo's direct or indirect control of the Senate," he said in an interview with Cope.

Why are the Senate elections important this time?