Jewel-Osco owner Albertsons is giving up on its merger with Mariano’s parent Kroger and it is suing the grocery chain, saying it didn’t do enough to secure regulatory approval for the $24.6 billion agreement. The move came the day after two judges halted the merger in separate court cases. U.S. District Court Judge Adrienne Nelson issued a preliminary injunction blocking the merger Tuesday after holding a three-week hearing in Portland, Oregon.