Without his tweets, we'd only know about how crazy and unbalanced he is via the "biased" and "corrupt" and "failing" media... with Twitter, we get to see it directly from his keyboard, thus leading to better debate about his fitness to serve.

P.S. Loved the Full page NY Times ad of his tweets - https://pbs.twimg.com/media/Cviq5rBWYAQeh56.jpg

That being said, it's a double standard, most ordinary people would have been banned before they tweeted half-way down the first column of what's in that ad...