The White House has argued that Russia's dependence on gas revenues makes it unlikely that the country will cut off supplies to Europe.
Edward Chow, a senior fellow at the Center for Strategic and International Studies, said U.S. officials also should work with counterparts in Germany and other European nations to relax restrictions on fracking and other drilling techniques. Many European countries ban fracking, a luxury Chow said they can no longer afford.
"They should improve their own (energy) situation," before seeking U.S. help, he said.
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