DNC is trying to keep him off the ballot. He's a huge threat polling in double digits. If they fail to keep him off the ballot Biden is going to lose. He may lose anyway but it's all but guaranteed if Kennedy runs as an independent.
Discussion
This technique of just sueing people off the balot , like , how the fuck is that allowed?
Democrats have nearly perfected using the justice system as a cudgel. Even liberal justices only bend so far though. The Supreme Court just ruled unanimously 9-0 against the state of Colorado trying to remove Trump from the ballot. That ruling scuttled all the similar cases developing in a few other states.