The reddit discussion appears to be three months old. If you visit the domain now, it appears to be a godaddy parking domain. So, perhaps the resolution was that the poster let it expire, and now basically nobody has it?

A quick cruise around variations on "trumpsucks.com", "trumpsucks.net", "notrump.com", and other such domains shows no clear pattern to me in ownership, each being owned by what appears to be a different person, all clearly not owned by the "THE TRUMP ORGANIZATION" that owns trump.com.

It seems like this may be exactly what it seems; an organization believing that people will be fooled into thinking that "trumpd.com" is sourced from THE TRUMP ORGANIZATION. It seems to me that despite the apparent politically-charged subject matter, that this is just a standard trademark dispute. Which I say without reference to whether that's a good thing or a bad thing. (With the explosion of TLDs it's probably becoming an irrelevant thing; only the very largest organizations are going to be able to keep up with this sort of thing in the full DNS space anymore.)