The PP-Vox alliance risks alienating moderate and regional parties like Junts, whose rejection of the PP underscores the deepening polarization in Spanish politics. Junts' Antoni Castellà stated that an agreement with the PP is impossible, warning that the PP would imprison Catalan leaders if given the chance. This highlights the trust deficit. By aligning with Vox, the PP adopts a harder line on issues like the Grandchildren Law and Catalan independence, making it toxic for potential partners like Junts. This could backfire nationally, as Junts holds key swing votes.
The strategy may also energize leftist and independentist voters who see the PP-Vox bloc as a threat. Vox's campaign against the Grandchildren Law risks alienating the Spanish diaspora. Rather than consolidating the right, the PP-Vox alliance may narrow the PP's appeal and make governance more difficult, as it discourages centrist and regional alliances.