A local sheriff has described the effort to find Today show host Savannah Guthrie's mother as "a race against time." Pima County Sheriff Chris Nanos told Today , "It is a race against time, and I hope that window hasn't closed." Nancy Guthrie, Savannah Guthrie's mother, was last seen at her home in Arizona on Saturday. Nanos said at a news conference that the older Guthrie, who is 84, needs daily medication. He said it could be fatal if she did not have the medication every 24 hours. Nanos said