My best bet would to go with 'were' because they sound similar and it just seems more professional.
Answer:
"Americans born in this country, changed by ...has always been committed..."
Explanation:
The reason why this is a use of an emotional appeal is that it focuses on the pride that Americans have and the strong connection they have to their country. Another appeal to emotion would be, "...we are the heirs of that first revolution." a sense of strong American pride is shown here as well because of the emotional appeal of perseverance against the odds to fight for what you believe in.
I didn't understand what you meant by "underlined words" because there aren't any underlined words, but here's the sentence rewritten:
Often, we are invited to the parties.