Why did Ketanji Brown Jackson criticize part of the Supreme Court’s Trump v. Anderson ruling?

In the case of Trump v. Anderson (2024), Justice Ketanji Brown Jackson, along with Justices Elena Kagan and Sonia Sotomayor, concurred with the Supreme Court’s judgment that individual states lack the authority to remove a presidential candidate from the ballot.12

However, they issued a concurring opinion that forcefully criticized the Court’s majority for addressing and deciding "novel constitutional questions" that were not strictly necessary to resolve the case. Specifically, Jackson and the other justices objected to the majority’s determination that Section 3 of the Fourteenth Amendment can be enforced exclusively through congressional legislation. They argued that the Court should have limited its ruling to the issue of state authority rather than reaching broader conclusions about federal enforcement mechanisms.12