Hey @Michael1!
I had a similar use case a long time ago.
Here’s the formula I used back then:
(I added in your field name {City/States})
TRIM(
SUBSTITUTE(
REGEX_EXTRACT(
{City/States},
"(,\s..)"
),
",",
""
)
)
Now, there is a something important to note.
This (specific) formula only works if you have a comma and a space before the state code.
This requires that you must have consistent and clean data in order for the formula to be consistent.