White House getting boxed in by red lines on Ukraine: The Note

Other nations are watching President Joe Biden's actions closely. And Putin himself, of course, has not so far been deterred.

The TAKE with Rick Klein

For all the U.S. has done to isolate Russian President Vladimir Putin, the list of what the Biden administration won't do continues to grow: There will be no no-fly zone, no U.S. troops defending Ukraine, no help in delivering planes that Poland wants to get to Ukrainians.

There's likely to be more that Ukraine wants that the U.S. won't give. That figures to be a theme out of the extraordinary virtual speech to Congress that Ukrainian President Volodymyr Zelenskyy is scheduled to deliver Wednesday.

The White House is bristling at questions about "red lines" and hypothetical situations. But defining the American reaction by what it is not and will not be has ramifications of its own.