The day Constitution faced reform and Mercosur broke through

Constitution Day ceremonies began with flag raising amid political tensions. Sánchez proposed constitutional reforms to protect housing rights, same-sex marriage, abortion rights, and pension increases - a significant shift from previous ceremonial approaches. Feijóo countered by accusing the government of attacking the Constitution, while Armengol called for consensus-based reforms.

By afternoon, attention shifted to the unexpected breakthrough in EU-Mercosur trade negotiations, frozen since 2019. The agreement's completion, despite French opposition, sparked immediate concerns from Spanish agricultural sectors about food standards.

Sánchez intensified his rhetoric against what he termed "political and judicial harassment," predicting it would backfire against his opponents - a continuation of his defensive strategy from previous days. The Koldo case continued developing in the background, with Ábalos requesting a delay in his Supreme Court appearance.