Basically zero. The DEA Administrator is a Trump appointee. If for some reason he decides to fight it, he'd be gone immediately.
They might try to slow-walk it, but there's really no point. This isn't a fight anybody wants to win any more. If it destroys some fiefdoms within the DEA, nobody above them is going to care.
What are the odds of the DEA simply saying "Nope!"?
Basically zero. The DEA Administrator is a Trump appointee. If for some reason he decides to fight it, he'd be gone immediately.
They might try to slow-walk it, but there's really no point. This isn't a fight anybody wants to win any more. If it destroys some fiefdoms within the DEA, nobody above them is going to care.