Americans are sharply divided over legalization of unauthorized persons. (From Civiqs). Keep in mind that 60% of unauthorized persons have resided in the U.S. for at least ten years.
Overall, the division has been stable, turning more towards deportation very recently. These figures are for April. It used to be about 57-32. It is now 53-37
Whites are far less willing to grant citizenship that other racial / ethnic groups.
Strong support for citizenship is concentrated in young people.