[fargus111111111]

Just from personal experience I can say that the established team will likely come out ahead if you just keep going. A good, well established team takes time, enthusiasm, and resources. I understand that they are taking some of your resources but if you retain more freedom for members and show better results to your sponsors they will stick with you. This mentor that you are having problems with sounds like they will probably be gone when their child graduates anyway, if that is truly the reason for starting the new team. My advice would be to try to do something about it now because it is definitely not good for your team, but do not panic because the situation will likely dissolve itself in a few years. We had a similar situation except they weren't in the same school, just the same town. They did well the first year, then it all went down hill. 2015 looks to have been their last season. When dealing with the other team always remember your gracious professionalism. It always goes a long way toward resolving conflict.