A federal lawsuit has been joined by Travis County, aiming to block a proposed rule related to mail-in ballots. The rule in question is associated with the Trump administration.

The lawsuit seeks to prevent the implementation of this proposed rule. Further details about the lawsuit and the proposed rule are available from the source.

Travis County's decision to join the lawsuit is part of a broader effort to challenge the proposed mail-in ballot rule, but specific aspects of the rule and the lawsuit's arguments are not specified here.