U.S. Supreme Court Justice John Roberts

Updated at 5:35 p.m.

A sharply divided U.S. Supreme Court stood by its most recent abortion-rights precedent Monday, delivering a major defeat to abortion opponents who had hoped for a reversal of fortunes at the court with the addition of two new Trump-appointed justices.

By a 5-4 vote, the court struck down a Louisiana law that was virtually identical to a Texas law it invalidated just four years ago. Chief Justice John Roberts cast the fifth and decisive vote.

Chief Justice John Roberts
Andrew Harnik / Associated Press

U.S. Supreme Court Chief Justice John Roberts is set to speak at a judicial conference at The Greenbrier resort.

Roberts is scheduled for a question-and-answer session Wednesday in White Sulphur Springs with Judge J. Harvie Wilkinson of the 4th U.S. Circuit Court of Appeals.