What happened to it? Our elected representatives, whose obvious goal is to deconstruct the United States, knew that the wall would solve the problem of Mexicans flooding into the country. So they defunded it. They WANT Mexicans, and everybody else, flooding into the country. Throughout history, a nation was destroyed by moving the populace out of their country. Now, other nations are brought in. Same outcome — the host nation vanishes. Look at what is happening in Europe, England.
More to the point, the Corporations and the Bureaucracy want the illegals. Why? The Bureaucracy wants clients for its services, so they can get bigger. The Corporations want the cheap labor. They also know the illegals will need STUFF after they get here. They don’t particularly care how they get the $$ to pay for that stuff (jobs or welfare). The Politicians, of course, want votes.
Who gets screwed? The US taxpayer. No one cares about Him.