[_dkqd]

I'm not talking about ethnic Russians/Ukrainians, I used "native English speakers" as a codeword to refer to "real" Americans, i.e. people who are have deep ethnic and historic loyalty to the American cause. You cannot rely on most ethnic Russians/Ukrainians in America to have blind loyalty to an American cause.

[influx]

There's more than 100 Americans who have been trained in Russian in the Defense Language Institute. Looks like Russian is a 48 week course:

https://www.dliflc.edu/about/languages-at-dliflc/

[_dkqd]

The number who are actually fluent and culturally embedded is miniscule. I personally know some graduates of this program.