Key Highlights
- Savannah Guthrie's mother, Nancy, has been missing since Saturday from her Tucson home.
- Mary Carillo will co-host the Winter Olympics opening ceremonies in Guthrie's place.
- Pima County authorities are actively searching for Nancy Guthrie, suspecting foul play.
- President Trump reached out to Savannah Guthrie to offer support amid the crisis.
- Guthrie's Today show co-host, Craig Melvin, will also remain in the U. S. during this time.
