Kostunica is maybe not, but he cannot do much. The elections in Serbia are not really "free and fair" because there is too much pressure and intimidation from the West.
Give me a break. An election is only free if the the voters are able to completely ignore the international ramifications of their choice?
Then no national election anywhere is ever free.
Kostunica is a brilliant man and an honest one. He was so pro-American that, when Yugoslavia was still communist, Kostunica translated the American "Federalist Papers" into Serbian. But now , he is between a rock and a hard place -- and there are no good options for him to lead his country where it needs to go.
Tadic and his late predecessor, Zoran Djindjic, would both sell their mothers for a $1.25. They were and are Western auctioneers for "a fire sale on Serbian assets". (Djindjic got himself killed by the very mafia he was using for some of his more underhanded business deals.) I personally didn't shed a tear when someone took him out.
But, because of Djindjic and now Tadic, and Western (largely German for Djindjic, Tadic spreads his legs for anyone for a buck), Kostunica had to make a choice -- to be the "least desirable" of what the West considers "the good guys" (Djindjic & Tadic) or be the "most desirable" of what the West thinks are "the bad guys"(The Serb Nationalists). Kostunica chose the first option and was nearly destroyed by the very political and business interests that want to "buy Serbia in pieces" . So, on the advice of political strategists -- one of which was American political writer, Srdija Trifkovic (the Rockford Institute), he chose the second option, to be perceived as "the best of the bad guys". Problem is that if Kostunica makes a deal to hand over Kosovo, his fragile coalition will fall apart and he will be exiled to obscurity.
Kostunica is the best guy for Serbia and he is the best guy for America, but he is getting steamrolled by an international community intent of keeping Serbia on its knees forever and stealing what they want from corrupt politicians. The (largely Western business driven) "independence drives" of Montenegro and Kosovo are perfect examples of that. They both have politically corrupt leadership.