It's pretty obvious the Democrats want to flood the country with future (or fraudulent) Democrat voters.
The Republicans should counter with the following
- Add something to the Republican platform that will entice invaders at the Southern border to vote non-Democrat. When the Democrats in Congress see those new Hispanic voters voting Republican, they will stop wanting open borders. It's my understanding, and I could be wrong, that Hispanics are almost all Catholics. There's your fulcrum. Add a catch-phrase to the election, something like:
"Los Demócratas quieren que mates a tu primogénito, como hizo el rey Herodes al matar al niño Jesús. No seas un Herodes. Votar Republicano."
English Translation: Democrats want you to kill your firstborn, like King Herod did to kill the baby Jesus. Don't be a Herod. Vote Republican.
- Offer green cards or citizenship to any English speaking tourists, anyone in fact who would tend to vote Republican in future elections. When they arrive at the airport, and assuming they aren't criminals, give them a fresh American Passport.