Russia, however, already controls about 11 percent of global oil production, and their seizure of downstream assets in the U.S. does pose a considerable concern for conflicting economic interests, prompting some experts to worry about vulnerability in U.S. energy and national security. Related: Aggressive U.S. Oil Sanctions Could Bankrupt Venezuela It's quite possible - in fact it's probable - that Rosneft's potential activity on U.S. soil will have no negative impact on the U.S. economy, as their objective is presumably to keep making money. However, if for some reason they had political reason to withhold supplies of gasoline, diesel, and other refined products, they could do so on a whim, causing oil prices to spike and jeopardizing the U.S.' economy and energy autonomy. The already complex entanglement of Venezuela's PDVSA and Russia's Rosneft is further complicated by the increasing threat of sanctions by the U.S. against Venezuela.