Apologies if I misread/misinterpreted you, but police can't (generally) strike in the USA. Most states have a specific laws against police and firefighters from going on strike. Federal law enforcement cannot strike
edit: a source (I assume lawyers.com is reputable..) https://legal-info.lawyers.com/labor-employment-law/wage-and...
Oh no, they still strike. It's just one of the other definitions: "to engage in battle. to make a military attack."
It's not legal, that doesn't mean it doesn't happen.
See "Blue flu" for cases where cops coordinate a strike using sick leave. Another way they strike is by simply not doing their job. They'll just sit in their cars all day and won't respond or will severely delay response to dispatch.
AFAIK, those cops never get a ATF style house cleaning.