If that is 6-8% then Flex was a -0.5 % (not even possible).
Ah, I chalk it up to dude being a politician and playing on the ignorance of the masses.
it's not 6% but it's most likely 8%
p.s. he doesn't look that lean, coz he has near ZERO muscle
put 20 pounds of pure lean muscle tissue on him while keeping his bodyfat at the same level as it is in that pic, and he would appear MUCH LEANER