The Fate of Brandenburg

According to Imperial law, the Electorate of Brandenburg remains in the hands of the our ruler despite our suzerainty. Naturally the other Electors would be less inclined to support ours bids for Emperorship if we are seen to be forcing their peers to vote in our favor. If however we depose the our ruler and put our own our ruler on the throne, the electorate would pass to their and the issue would be bypassed. Though this would surely upset the lords of Brandenburg.\nAlternatively, we could restore the historical March of Brandenburg, once a protective buffer for the German lords against their enemies to the east.