The President and Congress should close the border and give everyone illegally in the USA two weeks--perhaps a month--to leave. After that, anyone in the USA illegally should receive draconian penalties such as confiscation of all assets, a lifetime of prison with no parole, and no chance of ever receiving US citizenship.
Certainly no benefits should accrue to anyone breaking US laws and entering the USA illegally. Such people are criminals--no matter what the spurious propaganda, including euphemisms, to the contrary may claim.
Children brought to the USA illegally should be returned to the countries of their origin promptly, or, if they cannot be, held and educated in a holding facility until the reach adulthood and then deported.
Anyone voting illegally or fraudulently--any kind of election fraud--should receive the same draconian penalties.
Such penalties are necessary now because the survival of the Republic is at stake.
I’m not going to count the number of uses of the word “should” in your post, but there are a lot. We all agree that these things should happen, but will they? No.