C-SPAN Amy Coney Barrett has served on the United States Court of Appeals for the Seventh Circuit since 2017. She was previously considered by President Trump to fill the vacancy on the Supreme Court left by Justice Anthony Kennedy and filled eventually by Justice Brett Kavanaugh. Barrett previously clerked for the late Justice Antonin Scalia on the US Supreme Court. Visit Business Insider's homepage for more stories. Amy Coney Barrett is to a potential a frontrunner for a Supreme Court vacancy under a Republican administration, with President Donald Trump reportedly cited her specifically to confidants as a leading contender for the seat held by Associate Justice Ruth Bader Ginsberg in the event of a vacancy.Justice Ginsberg died September 18 at age 87 due to complications from cancer.