Your comment implies that the CATO study results are not true due to the Singapore example.

However, pointing to a different country that achieved success with “eugenic” immigration (it’s not even clear what you mean given that Singapore has had very high immigration but for the sake of argument let’s assume it’s the opposite of whatever the study here found) does not invalidate or disprove that the U.S. deficit reduced due to U.S. immigration.

It’s the kind of logical fallacy one would hope a 4 year old would grow out of, and yet…