* More creative threat-modeling.
* More effective prevention measures.
* More vigorous mitigation & stonewalling attempts.
* More rapid remediation & rejection of the intrusion.
Especially for a threat vector that was telegraphed so openly so far in advance. The circumstances might be unprecedented, but they're not at all surprising.
There are plenty of mitigation and stonewalling going on, but mostly through the courts.
Executives must have some power, or else the process itself becomes the executive and there's no ability to respond to anything.
If there's anybody to blame, we must place the blame on the executive wielding the power, and those who have enabled this to happen by putting that particular executive in power by subverting the traditional vetting process. If a political party no longer performs basic vetting of that level then the entire party should probably be eliminated.