Both will be stunted because they can't get light and nutrients because they don't share root space, or one will out grow the other and shade the small one so it dies, or they both die, nothing good will happen.
Bush was a better president? Are you freaking insane? Did you forget what he did to this country? 6000+ Americans dead for what? Wall street collapse? TARP ? Have we had another 9/11 attack on Obama's watch? Never mind I already know your answer....