Article continues below advertisementPima County Sheriff Chris Nanos is facing a formal recall effort following intense criticism over his handling of the high-profile disappearance and suspected abduction of Nancy Guthrie, the 84-year-old mother of Today show co-host Savannah Guthrie.The recall petition was filed with the Pima County Elections Department on March 12.The effort is led by Daniel Butierez, a Republican congressional candidate, who describes it as a bipartisan movement with around 500 volunteers collecting signatures.