As expected, the affidavit is heavily redacted for the usual reason, which is to cover their criminality and corruption.
The DOJ just released the affidavit submitted in support of the search warrant of former President Trump’s Mar-a-Lago residence.
We did get a glimpse of one reason why the raid was neccessary (Sean Davis tweet):
Biden's DOJ told a federal court that the FBI had to raid Trump's house because a CBS news article saw trucks at Mar-a-Lago when Trump was president.
If that doesn't scream Russian asset, I don't know what does.