Interestingly, BBCWatcher and Bev have both expressed the view (in a different thread) that Child Benefit is covered by Publication 951.
And as Bev admits, it's a try it and see. Bev's stance on different topics is often quite good, but at times Bev is incorrect when it comes to topics concerning the UK.
Child Benefit is a UK Social Security benefit.
Yes, there is a segment of SSA concerning child benefits. Is UK Child Tax Credits comparable to SSA Child Benefits?
Nun suggested claiming so would be an aggressive stance. You countered with "why is it aggressive?". My only comment is there is no where in Title 26 that allows a foreign Child Tax Credit to be excluded/exempt from declared income. Is there anywhere in the Treaty that allows it? If not, it's an aggressive stance.
As I keep saying, it's a judgment call.
My only comment would be if someone wishes to take the stance that UK Child Tax Credits are excluded/exempt from being declared on a US return, they should have a solid indication within either the Treaty or Title 26 to quote as to why this should be so. I, personally, would be reluctant to do so until someone offers a reasonable explanation as to where/why it is no longer aggressive/not allowed.