Don't change horses at midstream.
1. Proverb Do not try to choose or back a different political figure for an election after the decision has already been made or the position filled. Many people are dissatisfied with the senator's performance but will likely carry his party's support through to the next election—don't change horses in midstream, as the saying goes.
2. Proverb By extension, do not make major changes to a situation or course of action that is already underway. I'm really not confident in the strength of my essay, but I guess I just have to see this one through at this point. Like they say, don't change horses at midstream.
Don't swap horses at midstream.
1. Proverb Do not try to choose or back a different political figure for an election after the decision has already been made or the position filled. Many people are dissatisfied with the senator's performance but will likely carry his party's support through to the next election—don't swap horses at midstream, as the saying goes.
2. Proverb By extension, do not make major changes to a situation or course of action that is already underway. I'm really not confident in the strength of my essay, but I guess I just have to see this one through at this point. Like they say, don't swap horses at midstream.
swap horses in midstream
1. To choose a new leader during a period of upheaval or uncertainty. The prime minister has been at the helm throughout the crisis. I just don't think we should swap horses in midstream.
2. To make major changes to a situation or course of action that is already underway. We're about to close on the house, and my husband suddenly wants to swap horses in midstream and look at another property!