U.S. President Joe Biden and his Russian counterpart Vladimir Putin on Thursday issued warnings to each other amid a standoff over Russia's military buildup on the border with Ukraine, but affirmed diplomatic engagements involving their countries next month.During the phone call, which was the second exchange between the two leaders in December, Biden reiterated his call for a de-escalation of tensions and made clear that the United States and its allies will "respond decisively" if Russia further invades Ukraine, White House Press Secretary Jen Psaki said in a statement.Putin warned Biden …READ FULL ARTICLE
