In Season 4 of House of Cards, while Frank Underwood is still comatose and awaiting a liver donation, Doug Stamper is trying to get Underwood to the top of the list of people waiting to get a transplant. After pressuring the person in charge of said list to bump Underwood from the second spot to the first, we see a scene in which a young man named Danny shoots himself in the head.
I'm guessing that just from the direction and the order of sequences that Danny was somehow connected to the man whose spot Underwood took. After Stamper gets the ordering of the list changed, we see Danny shoot himself, and then Underwood immediately undergoes surgery. The viewer can infer that Danny's liver is the donation liver that Underwood needed.
After Underwood goes into surgery, we learn that the man whose spot he took passed away. Underwood later greets Danny's mother and introduces her to the other people who received organ donations from her son. In this scene, however, there is no mention of the man whose spot Underwood took. Given that, it is unlikely that Danny and this man are related.
It's highly unlikely that Stamper somehow found a teenager with a compatible liver to Underwood's and pressured him into killing himself given how little time Underwood had to get the donation.
Given that, do we know who Danny is and what his relation was to either of the top 2 spots on the liver transplant list?