Politicians already have special rights and restrictions.
Here's the argument. Democracy requires that politicians have the ability to contact potential voters. There are contribution limits as well as spending limits. In politics most of the money is spent trying to contact voters.
So tech companies banning some politicians but not others is a contribution in kind to a campaign.
The value of a verified Twitter account is far more than the direct contribution limit.
Therefore either all politicians should be allowed, or all must be banned from Twitter.
The FEC is unable to do its job because the Senate hasn't been confirming appointments.
So now states are trying to pass laws to fill the gap.