我也曾经这么理解，但是呢。。。

I could be wrong if I had the choice of going with the visa and the travel doc as well for my son,
and if a travel doc is harder than a visa.

Anyway, to get the travel document for my son born here, 我甚至出示头天晚上网上USCIS case status to prove
that my I-485 was still pending, and I have not got my Green card. 我六月刚刚带孩子回国.