Guya wrote:assuming the spouse is a non-resident alien (which we don't know based on the limited facts); the spouse has need for an ITIN. No such election exists as the one you are describing.
You're wrong, the spouse only needs an ITIN if she wants to file MFJ with him. There is no such election as not declaring NRA spouse's worldwide income, since that is the status quo unless the action of filing a W7 and getting an ITIN has been done. Applying for an ITIN would be an election to be taxed. To
not be taxed, no election is needed for an NRA married to US spouse.