Here is /r/the_donald critisizing Obama for not commuting Manning's sentence.
https://www.reddit.com/r/The_Donald/comments/5nvijk/free_the_whistleblowers_a_plea_to_donald_trump/
https://www.reddit.com/r/The_Donald/comments/5cc14q/prez_trump_please_consider_manning_assange/
Here is /r/the_donald critisizing Obama for commuting Manning's sentence.
https://www.reddit.com/r/The_Donald/comments/5okvy9/obama_commutes_the_sentence_of_transtraitor/
https://www.reddit.com/r/The_Donald/comments/5okvkx/obama_commutes_chelsea_mannings_sentence/
Here is /r/the_donald saying it is only happening because Manning is trans.