Best interest from American perspective would be to kill the rumor that US and PDM are in bed. Allowing PDM to move ahead with energy purchase from Russia would have an insignificant impact on Russian economy but serve to show Pakistani public that US is truly non - partisan in Pakistani domestic politics. As for the U-turn in PDM stated policy on the issue, Imran has taken many U-turns and have gotten away with it. I expect PDM to also be able to successfully market the U-turn as an independent move if they are serious about doing so