"To be clear, views across the political spectrum are allowed on Reddit - but all communities must work within our policies and do so in good faith, without exception".
"Reddit is a place for community and belonging, not for attacking people". The company said it took down a total of 2,000 forums, known as the site as "subreddits", most of which it said were inactive or had few users.
Only about 200 of the banned forums had more than 10 daily users.
Twitch, a subsidiary of the e-commerce giant Amazon, confirmed on Monday that it has separately suspended Trump's campaign channel on the platform for posting videos that ran afoul of its rules against content that "promotes, encourages or facilitates discrimination, denigration, objectification, harassment or violence" based on an individual's identity.
Hopefully this level of enforcement will help to make Reddit a more inclusive website, and will help prevent the company itself from profiting off of hate speech.
The second violation, cited by Twitch, referred to a portion of Trump's recent rally in Tulsa, Okla., where he outlined a scenario of "a very tough hombre" breaking into a sleeping woman's house at night.
In a blog post explaining the company's new rules, CEO Steve Huffman said users of the r/The_Donald subreddit had violated the site's policies for years.
The longtime pro-Trump subreddit used by "has consistently hosted and upvoted more rule-breaking content than average, antagonized us and other communities, and its (moderators) have refused to meet our most basic expectations", Reddit added.
The Trump campaign did not immediately respond to a Reuters request for comment. The other was from a 2015 campaign rally that was recently reposted on Twitch, in which Trump said Mexico sends people to the USA that are rapists and bring drugs to the country.
A Twitch spokeswoman said the platform had told "the President's team" a year ago that there were no exceptions on the site for political or newsworthy content that broke its rules.