Deletion of Opposition Party (United States)

Comment: changed from Keep) After doing some more digging, I can't find any detailed information about the "Opposition Party" anywhere except Wikipedia and its various mirrors.  There ''might'' have actually been an "Opposition Party" (I'm not an expert), but until sources are found to support it, this counts as |original research.  And if john k is right, then no such sources will actually be found
Stance: delete
Cited policy: Wikipedia:No original research (WP:OR)