From mid-2005, the PD's relations with the PNL became strained due to an ongoing open conflict between Băsescu and then Prime Minister Călin Popescu-Tăriceanu, who was also the chairman of the PNL. Previously, after his presidential victory in 2004, Băsescu appointed Popescu-Tăriceanu as Prime Minister. Although he wanted to, he could not constitutionally dismiss him; at least, it took him a while to do so. On 1 April 2007, Tăriceanu dismissed the ministers of the PD and formed a minority government.