[Grammar] whom/who I have to

[Oceanlike]

It seems that ‘contemporary’ English allows the use of ‘who’ in the following sentence. However, in academic setting, English purists would (likely) use ‘whom’ based on traditional grammar rules – I think.

The Bradfords, whom/who I have to babysit for, are planning to relocate to the West coast.

If I am sitting for an examination, I think I would use ‘whom’.

Thank you for helping me to understand :-D

 

[Oceanlike]

The answer has to be in this form: The Bradfords, whom/who I have to babysit for, are planning to relocate to the West coast.

 

[Tdol]

I agree. Whom with the preposition coming where it does in the sentence sounds odd to me. I can't say it's wrong, but it doesn't sound natural to me.