Well, you used “us” and “us” close to one another, and one of them referred to the United States and the other was a pronoun. It took several reads to make sure I rewrote it correctly in my other comment. I am pretty sure you're not being considerate about how “unambiguous” your sentences are without capitalisation & punctuation, and even if they were, they take significantly longer to read. As a person who became proficient in English as their second language, I am baffled by how frequently natives botch their national heritage.