The Biden administration believes that a contingent of North Korean troops is en route to Russia’s Kursk region to assist Moscow in countering a Ukrainian offensive launched there in August, according to a U.S. official. Although U.S. officials have not confirmed South Korean reports that North Korean soldiers will engage in direct combat, they estimate the North Korean force could number in the thousands and may rapidly be assigned to combat roles, the Wall Street Journal reports. The U.S. official’s remarks followed National Security Council spokesperson John Kirby’s statement earlier on Oct…