President Joe Biden continues to caution against a potential Russian invasion of Ukraine despite reports of Russia withdrawing some of its troops from the Ukrainian border. Not long after Russian President Vladimir Putin said Tuesday that he is open to security talks with the West and that some Russian forces are leaving their position near Ukraine, Biden gave a speech saying that a Russian invasion is “still very much a possibility.” Biden added that while a Russian troop withdrawal “would be good,” the United States has “not yet verified” that any troops are pulling back. “Indeed, our analysts indicate that they remain very much in a threatening position,” Biden said before totaling the total Russian troop count along the Ukrainian border and in Belarus at more than 150,000—an increase from previous claims. This is after the Russian Defense Ministry described images it released Tuesday of tanks and armored vehicles on …