Why would he do that? Labus is his candidate after all. Djindjich always puts forward someone else because of his atrocious reputation with the citizens of Serbia.
Somehow my feeling is Labus was not his 1st or ideal choice. I believe he does not fully trust him and that he is a bit affraid of him. Labus might have more US support than Dj could stand?
Who would be your choice?
Cheers!