Two judges seen as leading contenders to be President Donald Trump’s nominee for the U.S. Supreme Court have a limited record on class actions and mass torts, but their rulings on some class actions and arbitration give a glimpse into their approaches.

Judge Amy Coney Barrett, who has served on the U.S. Court of Appeals for the Seventh Circuit for the past three years and the favorite among many in legal conservative circles, has been viewed as the leading contender for the nominee to replace the U.S. Supreme Court seat held by Justice Ruth Bader Ginsburg, who died Sept. 18.