A bipartisan group of House lawmakers may soon formally ask the Department of Justice to change its controversial policy on waivers of attorney-client privilege in government investigations, and one of the nation’s top business groups is actively looking for court cases in which to challenge the policy’s legality.

The waiver issue is now “a battle with multiple fronts,” said Stephanie Martz, director of the white-collar crime project of the National Association of Criminal Defense Lawyers. “It’s all really interesting right now.”