[8] He studied at the Colegio Castilla, managed by the Marist Brothers, and took the 8th year of the General Basic Education (EGB) at Douai School in the United Kingdom.

[10] He ultimately obtained his degree in law in the CES Cardenal Cisneros in September 2007 after having reportedly passed half of the credits of the 5-year licenciature in four months of that year.

[16] The latter degree is a source of significant controversy, as Casado was found to have obtained it from the now controverted School of Administrative Law of that university without ever attending any class, taking any test, and turning in a final dissertation.

[24][25][26] He made an initiation journey to Cuba in early 2007 (similar to the 2012 travel by his right-hand in the Madrilenian NNGG Ángel Carromero),[n 2] where he met with Cuban dissidents such as Oswaldo Payá.

[51] In response to a budget defeat, Prime Minister Pedro Sánchez dissolved the Cortes Generales,[52] giving Casado an early test of his leadership, which was also in the aftermath of the first right-of-centre government in Andalucia.

[54][55] This major loss was devastating for Casado and for the 2019 election campaign manager, Javier Maroto, who not only lost his seat in the Basque country to EH Bildu, but was fired by PP.

[56] Casado refused to resign; many members' worries about his controversial leadership, described as "a suicide",[57] were confirmed in light of the defeat, as he has now U-turned back to the political centre,[58][59] placing much of the blame of the loss on Cs and Vox for splintering the vote.

[62] Nevertheless, under Casado’s leadership, the PP made a significant recovery in the November 2019 general election, increasing its representation from 66 to 89 seats and reasserting itself as the main opposition force.

[66] In his farewell address to party members, Casado emphasized his loyalty to the PP and appealed for unity, expressing hope that the organization would continue to serve as a credible alternative in Spanish politics.

[67] Defunct He has been described as neoconservative (but Casado has consistently referred to himself as a “liberal-conservative,” focusing on tax reductions, support for small and medium-sized enterprises, and promoting family-oriented policies within the broader People’s Party program.

[72] According to Antonio Elorza, Casado's ascension represents the comeback of the reactionary PP in the name of principles and fidelity to political lineage: the family as a totem, a fiscal counter-reform, a heavy hand in Catalonia, a preventively repressive legislation and Francisco Franco's corpse remaining at Valle de los Caídos.

[75] Annoyed by the decision of a German court to grant the extradition of Puigdemont to Spain solely for the charge of embezzlement in July 2018 (which he branded as "humiliation"), he raised the possibility of abolishing the Schengen Area.

[76] In September 2018, he directly ordered the PP members of the European Parliament to abstain in the voting of the Sargentini report calling for triggering Article 7 proceedings against the Hungarian government of Viktor Orbán.

[82] According to Elorza, in his message, void of any criticism, Casado recovers the formulation of the concept of Hispanidad of the 1930s and reaffirms a particular idea of Spain, in which history, turned into a mechanism of exaltation, is used to propel a nationalist mobilization.

[83] The use by Casado of terminology, such as accusing NGOs of being "human traffickers", while also criticizing a perceived "do-goodism" in the Sánchez government regarding its migration policy has drawn comparisons to Italian deputy prime minister Matteo Salvini by Steven Forti, of the Rolling Stone magazine.