Complex sentence: It is unclear if the party simply changed its name, or if the Manitoba WIP was formed by secessionists from the WCC--in any event, the Manitoba WCC does not appear to have existed past 1987.
Split into simpler sentences: It is unclear if the party simply changed its name, or if the Manitoba WIP was formed by secessionists from the WCC. In any event, the Manitoba WCC does not appear to have existed past 1987.