So only 1 candidate in a presidential election will be able to tweet to people, and twitter has a large share of the social media market.
You keep going back to webpages, and guess what? IT ISN'T THE ******* SAME
How about this, if Twitter wants to only allow one person running for President to use their platform, than any tweets by that candidate constitute a donation on twitters part to the campaign.
Because if you ban one candidate from your platform, that's what you are doing, contributing to their campaign.