Momcilo Krajisnik, a Bosnian Serb former wartime official, was taken to a hospital last month after developing pneumonia.
Prime Minister of Republika Srpska Zeljka Cvijanovic met with Corey Lewandowski, Steve Bannon, Sarah Huckabee Sanders and Kellyanne Conway during a recent trip to Washington D.C.
Some 120,000 landmines remain in Bosnia following a three-year civil war.
Twenty-one years after the genocide, 127 newly found victims were buried Monday.
The move threatened the integrity of the country, 20 years after it emerged from war.
Bosnian Serbs massacred an estimated 8,000 Muslim men and boys in Srebrenica in 1995.