Biden's Full Plate -- Ukraine, Taiwan, Tehran

One day after warning Russian President Vladimir Putin he would face "severe" economic sanctions, "like ones he's never seen," should Russia invade Ukraine, President Joe Biden assured Americans that sending U.S. combat troops to Ukraine is "not on the table."

America is not going to fight Russia over Ukraine.

"The idea that the United States is going to unilaterally use force to confront Russia invading Ukraine is not in the cards," said Biden. "We have a moral obligation and a legal obligation to our NATO allies," but "that obligation does not extend to ... Ukraine."

Anti-interventionists who have opposed bringing Ukraine into NATO may just have kept America out of a confrontation or war with Russia.

Yet hard negotiations lie ahead on the two demands Putin has made a condition of keeping his 100,000 troops on his side of the border.