In January 2016, Stone accepted First Lady Michelle Obama's invitation to attend Barack Obama's 2016 State of the Union Address. Stone "had a heartbreaking moment" when a daughter of one of the victims of the 2015 San Bernardino attack in San Bernardino, California, thanked him for his role in stopping the Thalys train attack; Stone giving her a hug in response. Stone, in response to the State of the Union Address, said "What I will walk away with ... is how the president said we are still a strong country ... he made it clear that we aren't dealing with a giant war, but with low-grade thugs," and finished by commenting "In the grand scheme, they can't bring us down." When asked which presidential candidate he supported in the 2016 United States presidential election, Stone declined to comment, wanting to maintain the public non-partisan stand of the military. Stone currently lives in Sacramento as of 2018. On January 31, 2019, Stone became a naturalized French citizen, along with Skarlatos and Sadler.