by Sebastian Smith with Anna Smolchenko in Moscow WASHINGTON, United States (AFP) — President Joe Biden on Thursday warned his Russian counterpart Vladimir Putin of a tough US response to any invasion of Ukraine, while the Kremlin leader said anti-Moscow sanctions would be a “colossal mistake.” After a 50 minute phone call — their second in just over three weeks — both presidents indicated support for further diplomacy on the tense standoff between Russia and […]