do you think jeff sessions will ruin the legal pot movement if made attorney general?

No because he can't ruin the movement, it will continue in states, it is not like Obama's Justice department said it was ok. It will be illegal on the federal level under Sessions but it is illegal on the federal level under Obama administration anyway. I guess the real question will be this, right now as long as states exert controls on it the feds are ignoring it even though it is illegal, will Sessions continue the same. I remember Trump saying he was ok with medical marijuana so I don't see them trying to shut everything down.