Donald Trump has promised he can use his negotiating skills to end wars.But his approach is facing a major test on two fronts.He’s rejected Iran’s latest proposal to halt the fighting and reopen negotiations, while there’s still no breakthrough in efforts to get Russia and Ukraine back to a peace deal.Today, international relations expert Rajan Menon on whether the president can actually deliver peace in either conflict.Featured:  Rajan Menon, Professor Emeritus of International Relations at the City College of New York