If Barr were to appoint a special prosecutor, it would create another avenue in which the story would be thrust into the news.
Surely you're not suggesting a presidential nominees ties to a foreign country be investigated during the election, are you? Because I thought you said that was treason or something.
If you were referring to the Russia investigation, there was no predicate to start the investigation. The Russia investigation was just the Obama administration spying on an opposition party campaign to try to prevent them from winning an election, and to harm the administration after the opposition candidate won the election.
Based on the publicly available information, there appears to be more than probable cause to support that the Biden family has broken public corruption laws. In other words, there is a predicate to open an investigation.
Running for President does not give someone a pass if they have previously broken the law.