ChatGPT says that 26% of the U.S. population has at least one immigrant parent, and that 40-50% of the U.S. population has at least one recent immigrant ancestor (e.g. grandparents, etc). Chat GPT suggests that combining both immigrant parents and immigrant grandparent groups (likely not overlapping that much), a majority of the U.S. population has close immigrant family ties.
1 out of 4 U.S. residents were born abroad or their parents were born abroad – Coldstreams Travel and Global Thinking
I just updated the above post with the input from Chat GPT.