Bladeslap read the timeline  

Feb. 1 Biden put a freeze on Trumps drug price rules. Found with a easy internet search and then Biden has started his own program.  

Lets see, Biden wants part B to negotiate the prices, so they get a better deal.

but,

Trumps deal did the negotiating for them, it had to get them as cheap as any other country.

in otherwise Trumps in plan it could not get any better.

This is a wonderful example of how if something had Trumps name on it, had to go, even if they could not replace it with something better.