Rosatti took office in June of that year, with a Court reduced to three members after the departure of Eugenio Zaffaroni and Carlos Fayt. He then shared the majority with Ricardo Lorenzetti and Juan Carlos Maqueda, forming what became known as a "Peronist majority", which at times voted against the positions of the Cambiemos government, leaving Rosenkrantz isolated.
During his years on the Court, Rosatti signed rulings that were uncomfortable for both Macrismo and Kirchnerism. For example, he halted the gas rate hike in 2016, but in 2017 he ruled in favor of the payment of the Income Tax for new judges. He was also one of the judges who initially voted for the controversial 2x1 for those convicted of crimes against humanity —a ruling that the Court later reversed due to social pressure—.
Even more relevant for the current political context, Rosatti upheld the conviction of former vice president Amado Boudou in the Ciccone case, and also ruled against the appeals filed by Kirchnerist leader Milagro Sala, who has been convicted and under house arrest since 2016. In 2019, he voted to prevent the re-reelection of governors Sergio Casas and Alberto Weretilneck, a key ruling against attempts to remain in power indefinitely.
Cristina Fernández's criticism of Rosatti has been systematic since his appointment. In a harsh public letter at the end of 2020, she accused the Court of "leading and directing the Lawfare process" against her. "That media-judicial coordination to persecute and imprison opponents was deployed with full intensity since Mauricio Macri's arrival to the Presidency and, what's worse: it still continues," said the former president, in a phrase that reveals the conspiratorial tone with which she usually refers to her judicial situation.
The Kirchnerist contradiction is laid bare: that jurist whom Néstor brought into the cabinet and whom Frente de Todos voted for without objections to join the Court, today becomes one of their main political enemies. In fact, Rosatti was one of the three judges who convicted Cristina Kirchner.










