Vladimir Putin has opened an economic front in his war against Ukraine — intentionally cutting oil and gas supplies to European countries. Parts of Europe may be without heat or power as Russia’s weaponization of energy has sent prices soaring to more than 10 times the average. The risk of citizens freezing to death is a distinct possibility. Putin is gambling that Russia can last longer under sanctions than Europe under winter. That by inflicting enough pain, support for Ukraine will crumble. But how could this even occur, and what, if anything, can America do to help?