When must justices recuse themselves over family members’ acts?

The article discusses recent and historical cases of Supreme Court justices facing scrutiny over family members' actions, including Justice Samuel Alito's son's Treasury Department job and past controversies involving Justice Alito and others. It references calls for recusal in cases tied to the Treasury Department, the Jan. 6 Capitol events, and the 2020 election, as well as past ethical challenges involving Justice Tom C. Clark and his son.