Viewed as a moderate politician, he was part of the Kosovo delegation in the Rambouillet peace conference in early 1999, where he was reportedly praised for his concentration and focus.
Kosumi, koji se smatra umerenim političarem, bio je deo kosovske delegacije na mirovnoj konferenciji u Rambujeu početkom 1999, gde je, kako je izvešteno, dobio pohvale za svoju skoncentrisanost i usredsređenost.