ZAGREB, May 28 (Hina) - Prime Minister Tihomir Oreskovic, who on Saturday arrived in Zagreb's Vatroslav Lisinski concert hall where the ruling HDZ party was holding its electoral convention, told reporters that he had already stated his position on the proposal for the impeachment of his first deputy and HDZ leader Tomislav Karamarko, that it was difficult for him to predict how the situation would develop and that it was "now up to the HDZ."