rob: Chabad is not mekarev goyim. And they are not the biggest chasidus. Satmar is much larger than Lubavitch.
BTW, I think that the Religious Zionist/DL community had been losing representation the Kenesset every period from ’48 through future elections. Compare what the RZ party won in the first two elections to what they won in later elections. Eventually the NRP got so small they were wiped off the map. The current situation with Bennet might be an exception because he made his party partially secular/non-religious, i.e. Shaked.