He was elected to the Argentine Senate in 2007, representing the City of Buenos Aires on the Civic Coalition ticket.

He left the Civic Coalition on July 8, 2009, and formed his own parliamentary group, the Federal Buenos Aires Project, and was subsequently considered a circumstantial ally of the Cristina Fernández de Kirchner government.

[1] His books include El revés de la filosofía (Buenos Aires, Biblos, 1993), Introducciones a la Filosofía (Barcelona, GEDISA, 2000) and El abandono del Mundo (Buenos Aires, 2006).

On July 8, 2009, he announced he was leaving the Civic Coalition and forming his own parliamentary group, the Federal Buenos Aires Project.

[4] In 2013, at the end of his Senate term, Cabanchik decided to run for the Buenos Aires City Legislature on the Alternativa Popular ticket, which supported the FPV candidates for the Senate, Daniel Filmus, and the chamber of deputies, Juan Cabandié.