I haven´t been able to find a single story about these two - heck, there isn´t even a tag for poor Hardin! (Well, maybe I´m just searching wrong...)
I believe there is a lot of untapped potential in their relationship.
So I want a story which focuses on these two - in whatever form anon wants to write it. Gen-fics are completely fine.

Maybe they put their disagreements aside for one night and share a drink.
Maybe they´ve been friends or lovers until the situation escalated at Helios and they reminisce about past times.
Maybe Hardin tries one last time to convince McNamara that his way is wrong.
Or maybe it´s simply porn - that´s never bad, right?
Write whatever you feel like writing.

There are two things I don´t like:
If you go the porn-y route, please no non-con. I heavily dislike reading those.
And please don´t describe Hardin as some kind of power-hungry evil super-villain. He does deserve better than that.