The U.S. said on Wednesday it had seized a Russian-flagged, Venezuela-linked tanker as part of President Donald Trump's aggressive push to dictate oil flows in the Americas and force Caracas' socialist government to become its ally. Having deposed Venezuelan leader Nicolas Maduro, Washington is blockading sanctioned vessels in and out of waters off the South American OPEC member. The U.S. Coast Guard and military apprehended the Marinera tanker that refused to be boarded last month and switched to Moscow's flag, officials said. With a Russian submarine and vessels nearby after a two-week pursuit in the Atlantic, the move risked more confrontation with Moscow which has condemned U.S. actions over Venezuela and is already at odds with the West due to the Ukraine war. Russian state broadcaster RT showed an image of a helicopter hovering near the Marinera, originally known as the Bella-1, and said it looked like U.S. forces were trying to board the U.S.-sanctioned tanker, which is…