23 statement, Turner, a Republican party representative in the U.S. House of Representatives, called on the administration of President Joe Biden, a Democrat, to "make clear" that Pyongyang joining Moscow's full-scale invasion would be a "red line for the United States."Earlier in the day, the U.S. publicly confirmed for the first time that it had evidence that North Korean troops were in Russia, with U.S. Defense Secretary Lloyd Austin saying it "remains to be seen" if they would join the fighting.Two North Korean brigades of up to 6,000 personnel each are currently undergoing training in Russia, President Volodymyr Zelensky said on Oct. 22."Now that Secretary Austin has finally acknowledged that North Korean troops are in Russia preparing to enter the conflict with Ukraine, the Biden-Harris Administration must make clear that North Korean troops entering this conflict are a red line for the United States," Turner said.