Have them conform to the rules and follow the process that all American immigrants seeking citizenship must through.
They have to find and hold a job and take full financial responsibility for themselves and their family. If they can't hold a job and be a productive member of society they should be deported.
No welfare.
Meet minimum eduction standards.
Take citizenship lessons.
Demonstrate literacy and ability to speak the English language.
Follow the rules all immigrants have to follow. If they are convicted of any criminal offense they should be deported.
No voting until they have completed the full process which should take around 15 years, at which point they will be assimilated and will have learned our system and have a vested interest in the success of the United States.
Take a standard citizenship oath at the end of the process.
The process has worked for tens of millions of legal immigrants from all over the world and has made this country what it is today.
All other illegal immigrants are de facto felons who entered the country with criminal intent. They should forever forfeit their voting rights same way other felons have in the past.
I could support that.