The bracero program was NOT amnesty. It had to be applied for in Mexico. It did not apply to those already here.
Amd if you don't know how many illegals there were then, your question about the bracero program is moot.
You seriously think I have to know exactly how many illegal aliens were in the country in 1942 before I can make an analogy? I know how many were "expelled" in 1942. Does that qualify?
How about if the "guest workers" were forced to return to their home countries to apply for the program?