Oil isn't the only commodity at the center of tensions between the U.S. and Russia... Now Russian state-owned uranium company Tenex is telling American customers that "the Kremlin may preemptively bar exports" to the U.S. if Washington passes certain legislation that would prohibit imports beginning in 2028, Bloomberg reported on Friday. Tenex's US branch has already alerted firms like Constellation Energy, Duke Energy, and Dominion Energy about a potential scenario, the report says, though Russia hasn't finalized a decision. The individual…