Suffice

[ArcticBells]

Heard on the radio by a Trump aide “suffice it to say”. I always thought it was “suffice to say “. Have I been saying it wrong all this time?!

Either is correct; the version with "it" is more common, both in the US and in the UK.

https://books.google.com/ngrams/graph?content=Suffice+it+to+say%2Csuffice+to+say&year_start=1800&year_end=2022&corpus=en&smoothing=3&case_insensitive=true

Thank you!

When I saw the title I immediately thought suffice to say’.

You might say ‘sufficient to say’, but not ‘sufficient it to say’, so I prefer it without ‘it’.

That's because "sufficient" isn't a verb.

The phrase is a modification of "It suffices to say ..."
Leaving the "it" out of that would be sloppy / informal, so I personally slightly prefer to have the "it" in the word-order-modified version too.

Hmm. I think suffice is an intransitive verb; it doesn't take an object. So something 'suffices'. You can't suffice something.

Yes, "suffice it to say ..." Is a linguistic fossil from when English was more flexible about word order and the subject could go after the verb. Other examples: "be that as it may", "come what may", "long live the King", "perish the thought".