Not all, but many. I think the state troopers are more formal. Many police now wear fatigues and so no tie. I guess this is more old school. 

I honestly had never thought about cop ties and realized they were clip-ons. 

StillStackinAfterAllTheseYears

Get a clip on the. Cops use them for very good reasons. 

I prefer a real tie but if it's comfort verses misery choose comfort. 

OgFOMK

May be a mind over matter type of thing. 

Satosora

science

Research Check: do neckties reduce blood supply to the brain?

I've tried upping collar sizes, different styles (buttons and collar stays) even not buttoning the top button, and all of them feel fine until I tie the tie. Even if the tie isn't flush against me, it still feels like I'm choking a bit.