How they actually vote? Investment bankers, and it's not even close.
Just like in the '60s with Vietnam, Republicans might be screaming in their opinions, but this whole BLM vs. police department "battle" is an intra-party dispute more than it is Republican cops, LOL.
But it may be different in 2016. Trump has unprecedented support with non-college whites and is definitely slipping with college-whites. That being said, I agree that this election is probably extraordinary in that regard.
This election might change things, but not enough to flip it, IMO. I'm just going off of anecdotal evidence, but the vast majority of cops I've met have been Union-supporting Democrats who value federal spending very highly. Many have tough-on-crime stances, but so do many Democrats still. On the other hand, I've read articles about people on Wall Street saying (on the condition of anonymity) that they sometimes give to both parties - especially if, like in 2008, one party looks sure to win ... wanna be on the winner's good side! - but are pretty partisan Republicans. Republicans who might be culturally liberal, but Repubs nonetheless.
Also, it's not investment banking but I work in commercial banking, and even in a very liberal area (Iowa City) most people who have uttered anything about politics at work are Republican-leaning.
The thing is I think that in practice they might support "tough on crime" Giuliani types more often then not. Maybe swing voters who are just likely to go with whichever politician they perceive as being most friendly to them politically.