First, not that I'm excusing it if its true but the reality is that its normal. Campaign donations while conducting business is very routine. He has a point. Whenever white boys are caught, they say 'it's an oversight' and give back the money. It's very, very rare politicians are indicted. It happens but when you see the number of arrests and convictions compared to pretty much everyone from dogcatcher to the President does it, its tantamount to arresting a black person for jaywalking in Manhattan.
Also, the fact that federal agents set him up says that. Why choose him? That's also by design. He was mayor from 2014 - 2018.
Eric Holder was Attorney General 2009 - 2015 (black Democrat)
Loretta Lynch was Attorney General 2015- 2017 (black Democrat)
Jeff Sessions was Attorney General 2017-2018 (white racist Republican)
This comes down to which attorney general did it. If it happened under Sessions then its simple. It was known Gillum was going to run for governor against Desantis. So, if that was the scenario, Gillum has a point.