Boc's entrance into mainstream Romanian politics was in 2003, when he was elected executive president of the Democratic Party; he had been proposed by Traian Băsescu.
Hyrja e Boc në  politikën rumune ishte në vitin 2003, kur ai u zgjodh ekzekutiv kryetari i Partisë Demokratike; ai ishte propozuar nga Traian Băsescu.