[Not A Snowbird]

voluntary E-verify program

No. It has to be mandatory.

[Lurkinanloomin]

Absolutely MUST be mandatory.
It is voluntary now and there are still millions of illegal aliens working illegally.
Coordinated enforcement across all levels of government as it happens in most other countries is how we reduce illegal aliens.
In Japan if you are overdue to leave by 12 hours, they will find you and deport you.