This really goes to show the precariousness of the system…the Justice Department theoretically controlled by the President is investigating someone running against him. One more reason Biden is showing himself as up for the job, this takes some tact.

But I don’t know what the alternative system is. If the Justice Dept is fully independent (like, another branch of government) then it prevents the conflict of interest to some extent but you can still get Supreme Court style ideological takeover that could be biased or accused of bias. In some states the AG is a stepping stone to higher office, certainly the AG could run for President and there would still be a conflict.