"Hacked" is a strong word. That's not what happened. The DNC has a system which candidates and their campaigns have access to, and the campaign is able to pull information out of that system based on the candidate; for instance the Sanders campaign can get a load of phone numbers of DNC members who support him, but they can't access the same information for Clinton supporters. The systems are separated by a firewall, which is supposed to keep each campaign from accessing the other campaigns data.
What happened was some IT guy upgraded the firewall, but it either went down or didn't get configured properly, meaning campaigns could access each other's data. A member of the Sanders campaign apparently did some queries and got Clinton's data. He's been fired, so it's not clear why the entire Sanders campaign is being punished, hence them suing.
Not even remotely close to hacking, this was a DNC issue, which the DNC have decided to blame on the Sanders campaign.
What happened was some IT guy upgraded the firewall, but it either went down or didn't get configured properly, meaning campaigns could access each other's data. A member of the Sanders campaign apparently did some queries and got Clinton's data. He's been fired, so it's not clear why the entire Sanders campaign is being punished, hence them suing.
Not even remotely close to hacking, this was a DNC issue, which the DNC have decided to blame on the Sanders campaign.
