From October 2020:

Supreme Court is about to have 3 Bush v. Gore alumni sitting on the bench

Judge Amy Coney Barrett, once confirmed, will be one of three current Supreme Court justices who assisted the legal team of then-Texas Gov. George W. Bush in the Florida ballot-recount battle that came down to a single vote at the Supreme Court.

https://www.cnn.com/2020/10/17/politics/bush-v-gore-barrett-kavanaugh-roberts-supreme-court/index.html