WHAT RUSSIa cannot get by fighting it is demanding to be given on a plate through the pressure that Donald Trump can put on Ukraine and on America’s European allies. At the top of Vladimir Putin’s shopping-list is the western part of Donetsk province, which is still firmly in Ukrainian hands. But it is not just the symbolism that is important to him. The real prize is to force Ukraine to abandon its strategically critical “fortress belt”, a 30-mile (50km) line that comprises four cities and several towns, which stands in the way not only of Russia’s goal of gaining the whole of Donbas, but also of its ability to threaten other regions.