Kanye West is pulling out all the stops to get on the ballot in a crucial swing state that he sorta needs to have half a chance at this thing ... and it's home to the Grand Canyon! Sources tell TMZ ... Ye and his campaign are doing a full blitz to get his name in front Arizona voters' eyes come November, and a big part of that will lie in what KW and co. are willing to spend to get it done. Brace yourself ... we hear they'll drop half a mil if needed.