From a statement issued today by Joe Biden:
I have instructed my team to learn as much as we can about this breach, and Vice President-elect Harris and I are grateful to the career public servants who have briefed our team on their findings and who are working around-the-clock to respond to this attack.
A good defense isn’t enough; we need to disrupt and deter our adversaries from undertaking significant cyberattacks in the first place. We will do that by, among other things, imposing substantial costs on those responsible for such malicious attacks, including in coordination with our allies and partners.
Our adversaries should know that, as president, I will not stand idly by in the face of cyber assaults on our nation.