(CNN) Supreme Court Justice Ruth Bader Ginsburg was not on the bench for oral arguments Wednesday due to illness, according to Chief Justice John Roberts.

Roberts announced she was "indisposed due to illness."

A court spokesperson said that Ginsburg was home with a stomach virus and that she is expected to participate in the cases by reading the briefs.

The oldest Supreme Court justice, Ginsburg leads the liberal wing on the court, which is currently outnumbered 5-4 by conservatives.

She has been an active participant from the bench this term, often asking the first questions. She was present Tuesday when the court heard one of the most important cases of the term concerning President Donald Trump's decision to terminate the Deferred Action for Childhood Arrivals program.

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