Biden says US troops in Ukraine are off the table but promises withering sanctions if Russia invades

(CNN)President Joe Biden on Wednesday ruled out sending US troops to Ukraine to defend the country from a Russian invasion a day after laying out the consequences for such an incursion during a stern phone call with President Vladimir Putin.

It was Biden's first time describing Tuesday's two-hour conversation, which officials said grew tense at moments as the two men sparred over the massive build-up of 70,000 Russian troops surrounding Ukraine on three sides.

Biden ended the conversation without any further clarity on whether Putin had made up his mind to launch an invasion, officials said afterward.