Menendez is Cuban. The US doesn't share a border with Cuba.
Besides, Menendez is a pre-Castro Cuban, ie his parents immigrated to New York a full decade before Fidel came to power. He was raised in an Irish neighborhood. He is about as "Cuban" as Rudy Vallee.
Menendez is a corrupt socialist, pure and simple. His constituents have nothing to do with his embrace of illegal Mexicans.
The jerk pro-illegal Congressman from Chicago is Puerto Rican. They're already citizens.