Witches U.S.A. / Susan Roberts. (OCLC #2692802)
The LC-PCC PS for RDA 184.108.40.206 (Recording Variant Titles) mentions letters and initialisms (including acronyms). It says: When a series of letters or an initialism occurs as one of the first five words in a title proper with separating punctuation (hyphen, period, slash), make a variant title in the form without any separating punctuation if it is thought that some catalog users might expect that the letters would be recorded in that form in the source.
USA is a common way of writing U.S.A., so I recorded the variant title:
246 3_ ǂa Witches USA