You don't change horses in the middle of the race proverb
It is not sensible to change method, plan, or leader in the middle of a project or crisis.
I don't consent to alter the leader now as I believe you don't change horses in the middle of the race.
Despite his poor performance as a class monitor, we still support him until the end of this semester. You don't change horses in the middle of the race.
This proverb is a variant of " don’t swap horses in midstream," which is derived from a popular joke published in 1840, in which a man crossing a stream with his horse and colt falls into the water. He grabs the colt’s tail and lets it drag him from the water, but before making it to the other side of the water the colt grows tired. When bystanders advise him to grab the mare’s tail instead, the man says, “This is no time to swap horses.”
"Swap horses in midstream" was popularized by Abraham Lincoln in a speech in 1864.