Just a word of commiseration and some potential light at the end of the tunnel (for you and your DH).
DD went through a phase where (among other types of rejection) she would actually tell him to leave the room if he came in (in our 800sq ft house). He's a pretty even-tempered and emotionally resilient person, but it started to get to him too. And it did last for some months (maybe 4 or 5?). But just in the past couple of months she's grown out of it and now she and he are the best of buddies. She's 31 months now.
In the 'chopped liver phase' as you so aptly put it, the best solution I found was to be gone for some good chunk of time (like my 4-5 hours of work) and leave the two of them together. It was sometimes tough on the two of them, but usually I would come home and find them having a great time, and that would last for a day of two afterwards. It was just when it was between me and him that he'd get the boot. We didn't ever try and curb the impulse. He would sometimes tell her that it hurt his feelings, but we didn't really ever try and stop her or change her reaction. Didn't seem like it would work.
I've read somewhere in a different thread that around this age it's tough for a toddler to feel affection and pay attention to more than one person at a time. So they cope with loving two people at once by rejecting one. And that it's pretty common.