Updating our previous post, a second group filed suit (pdf) against the NLRB last week, challenging its ambush election rule.  This time, the challenge comes from The Associated Builders and Contractors of Texas Inc., who are joined by the same organization’s Central Texas Chapter and the National Federation of Independent Business/Texas.  They have asked the U.S. District Court for the Western District of Texas to enjoin the NLRB from implementing the final rule changes, which we summarize here.  The groups claim the NLRB exceeded its statutory authority in enacting the rule.