US has been constantly pressurizing the Venezuelan government of Nicolas Maduro over ties with other energy companies and vice-versa. From Russia's Rosneft to Chevron and Reliance, everyone has been warned to "tread cautiously". These comments have come in response to the question on about possible sanctions against Rosneft. I would tread cautiously towards their activities in Venezuela that are in support, directly or indirectly, of the Maduro dictatorship because ... we're halfway through our maximum pressure campaign", said US official.