strike over (something)
To engage in a cessation of work as a part of a job action over some issue. Employees have been striking over what they claim are unfair overtime requirements. Teachers across the state are striking over new reductions in their pay packages.
strike over something
to mark out printed words by putting x's over them or a line through them. Please don't strike over your errors. Erase them altogether. Betty struck over most of the misspellings.