It’s a common cry by incumbent politicians during election season – Don’t change horses in mid-stream!
Obama 2012- Don’t Change Horse In Mid-Stream
Of course, when the stream has run dry largely because the incumbents in question redistributed the flow elsewhere the situation – and the worth of these politicians’ cries – is more than a bit different. 😉
When your “horse” is actually a spavined and balky jackass and the stream has run dry it’s time to “trade up” if you can and change horses – and, at this sad point, even “shank’s mare” is a trade up.