> I seem to remember the Trump DOJ threatening to renew prosecutions and members of Congress making it clear that they would expand the prosecution ban if they had to.
If its not “sufficient numbers of Republican members of the Senate to force McConnell to actually allow it on the floor”—and it wasn’t—it was an empty threat; the House actually passed an expanded prosecution ban twice and a general decriminalization, none of those made it into any bill on the Senate floor.
> Biden's open opposition is the bigger issue here.
Not really, Biden publicly supports legalization of medical marijuana, decriminalization, rescheduling, permitting state choice on legalization, and automatic record expungement. This differs from federal legalization substantively only in that there would be federal backup for states that choose not to legalize, and has not openly opposed (or supported) the stronger legalization proposals now being announced by, among others, much of the Democratic Senate leadership.
The only meaningful barrier to something very close to full legalization is support in the Senate, mainly the potential of a filibuster, but there’s a couple uncertain D votes (like Manchin) that could prevent even a bare majority.
The President and the majority of the Democratic caucus have different positions, but not far enough apart to be a real barrier to lawmaking.
> Biden was a major Democratic leader in spearheading America’s war on drugs during the 1980s and ’90s.
Yeah, but its not the 80s and 90s; its the 2020s, and Biden has a very different position today.