You can read the article in Politico at this link.
Here’s the key excerpt:
It is time to begin rebuilding Americans’ confidence in the court by establishing a formal code of conduct. […] As the nation’s highest court, the Supreme Court has an even greater duty to set the example for courts around the country and demonstrate that its decisions are based on a fair and unbiased assessment of the facts and the law, not personal biases or their own financial interests. Eliminating ethical questions and conflicts of interests should be the starting point.