Joe Biden said there would be ‘enormous consequences’ globally if Russia invaded Ukraine and threatened personal sanctions on Putin if he does. His comments came as other Western leaders warned Russia would pay a heavy price for an invasion. The UK said it had ruled nothing out, including sanctions on people, banks and businesses. It wants all its allies to do the same, as collective action would deter Russia. Biden also said Europe must match America’s sweeping sanctions. However, Europe imports 45% of its gas from Russia, and Putin has used gas for geopolitical leverage before. Also, Ukraine is not a NATO member, so NATO has no obligation to defend it. Putin objects to Ukraine joining NATO as he wants to have more power there. Invasion is hard to imagine, but so is the prospect of Putin backing off without major concessions from NATO. Recently Russian, Ukrainian, German and French diplomats gathered for talks.