If anything, the_donald has gotten preferential treatment compared to everyone else. They've routinely broke rules and ignored warnings from admins. If any other subreddit did what they've done it'd be banned instantly. Instead Reddit keeps giving r/T_D leeway because they don't want to seem biased.

Here's a list from a year ago of rules they've broken: https://old.reddit.com/r/AgainstHateSubreddits/comments/851r...