> It's pretty clear to me that he did think about the election. That's the problem.
I disagree with your analysis. I think it's likely that Alvin Bragg is not a dumb guy. It is well known that a conviction would not prevent Trump from running for President. He also probably had a number of smart people giving him advice that this was going to do a lot to increase Trump's visibility and in general energize his base. If anything, the degree to which he considered it probably acted as a detractor, not the reason he went through with it.
I think Bragg prosecuted because of the reason that all prosecutors go after high profile cases in big regions. He knew it would bring him attention and he thought he had a good chance to win. In Alvin Bragg's world, that's enough to get you over the line.