There's a reason people say crimes that are punished with a fine are laws that only apply to poor people.
If he was a wealthy donor to Trump in an identical case he'd be rotting in Rikers with no hope of bail.
Take the Chevron case I mentioned in another comment. Deputizing an oil and gas law firm to criminally prosecute someone in the US for what they did in Ecuador began in the Trump administration. Biden's DoJ could intercede in the case and dismiss it. But they haven't. So there's no difference here between the two parties.
You'llsee that a lot. When it comes to any issue like this the government (including the White House, Congress and the courts up to and including the Supreme Court) will side with the wealthy most of the time.
Go back and look at any issue you might think is a partisan issue where you think someone is getting persecuted politically and really examine it through the lens of who has the money in that situation. That will determine who these institutions side with more often than not and way more than any supposed political leanings.