The war in Ukraine is widening.With Russia’s advance stalled due to fierce local resistance and Western support, analysts say both sides appear ready to dig in for a protracted conflict that is showing increasing signs of spilling beyond the battlefield.From warning of nuclear confrontation to stoking energy crises and perhaps even eyeing up fresh territories to invade, Moscow has ramped up its threats this week — but so has the West: The United States and its allies are readying huge new shipments of heavy weapons and military equipment to help Ukrainian troops on the ground, while voicing more ambitious goals...