Lawyers for Washington state will have past grocery chain mergers – and their negative consequences – in mind when they go to court to block a proposed merger between Albertsons and Kroger.

The case is one of three challenging the $24.6 billion deal, which was announced nearly two years ago. The Federal Trade Commission is currently fighting the merger in federal court in Oregon, where closing arguments are expected Tuesday. Colorado has also sued to block the merger.

But if the merger goes through, Washington residents would feel the impact more than the people of any other state. Albertsons and Kroger own more than 300 grocery stores in the state and control more than half of grocery sales there.