“We have to prime the pump. Have you ever heard that expression before? Because I haven’t heard it. I came up with it a couple of days ago and I thought it was good.”
–Donald Trump, in an interview with The Economist.
The Kingston Trio sang about having to “prime the pump” in their 1963 recording of Desert Pete:
https://www.oldielyrics.com/lyrics/the_kingston_trio/desert_pete.html
…and President Franklin Roosevelt used the expression in describing his efforts to speed recovery from the Great Depression, but the expression actually dates back at least to the 1800s.

