Since 2015 he has taken an active role in criticizing the emerging party Podemos, which he considers a populist threat, and have actively lobbied the PSOE against approaching Podemos for any possible government coalition. González supported PSOE candidate Pedro Sánchez in the 2015 and 2016 general elections, but in the aftermath Sánchez announced talks with Podemos and Catalan separatist parties. González then supported Susana Diaz faction in a bitter internal struggle which ended with PSOE facilitating the investiture of the conservative government and the dismissal of Pedro Sánchez.
In 2015 González traveled to Venezuela to support Leopoldo López and other imprisoned opposition leaders. His involvement came at the same time mainstream media and political parties were accusing emerging Podemos of having links with the Venezuelan government.
In 2015, González was awarded the Distinguished Leadership Award for Public Service in the Americas Award by the Inter-American Dialogue for his tireless, effective, and ongoing public service and commitment to democracy in Latin America.