 Predoiu became a member in 1991 of the National Liberal Party - Young Wing (a splinter from the National Liberal Party led by Dinu Patriciu and Călin Popescu-Tăriceanu), however this party was soon disbanded in 1993.On February 29, 2008, in a move that surprised even other leaders of National Liberal Party, Prime-Minister Călin Popescu-Tăriceanu proposed him as Minister of Justice, his candidature being approved by President Traian Băsescu.He was a candidate from PNL for the Chamber of Deputies in Buzău, however, he got only 28.9% of the votes, losing to Social-Democrat Marian Ghiveciu, who got 46.6%.