SCOTT SIMON, HOST:Ukraine's president, Volodymyr Zelenskyy, is giving up hopes of having his country join NATO anytime soon. But until the war is over, frankly, I think discussing membership for Ukraine in NATO or other security guarantees is really not a very good idea and a bad thing for Ukraine actually, because I think it - if there's discussion of this, if there are security guarantees offered, frankly, I think it incentivizes the Russians to fight harder and fight longer. Visit our website terms of use and permissions pages at www