The search for Savannah Guthrie's missing mom, Nancy Guthrie, has grown. NBC News reported on Wednesday, February 4, that the FBI is now involved in the investigation, which also includes about 100 detectives from the sheriff's office. The outlet also reported that President Donald Trump reached out to Savannah, 54, after an interview with NBC Nightly News anchor Tom Llamas to assure the family that every resource was available as needed. Trump, 79, shared on Tuesday that he would commit to sending more federal agents to aid the search.