De or het stembusoverwinning?

The correct Dutch article is:

de stembusoverwinning

Rule Words ending in -ing: almost always de. See the rule

How to use stembusoverwinning

the stembusoverwinningde stembusoverwinning
this stembusoverwinningdeze stembusoverwinning
that stembusoverwinningdie stembusoverwinning
our stembusoverwinningonze stembusoverwinning
your stembusoverwinningjouw stembusoverwinning
every stembusoverwinningelke stembusoverwinning
which stembusoverwinning?welke stembusoverwinning?
a big stembusoverwinning / the big stembusoverwinningeen grote stembusoverwinning, de grote stembusoverwinning