Trump joins search for Savannah Guthrie's missing mom by devoting full force of FBI: "God bless and protect Nancy"

President Donald Trump has joined the search for Nancy Guthrie, TODAY show host Savannah's mom, after pledging the use of 'all' law enforcement to the cause. Nancy, 84, vanished on Saturday evening after being dropped off at her Arizona property by her son-in-law Tommaso Cioni - who was the last…