Recent abuses? LOL. This has been going on for decades. Cruz is trying to take the immigration issue away from Trump. The problem is that Cruz has a record that contradicts his present stance. This concern for American workers is a recent epiphany.
But a welcome one, if backed up by concrete policy positions.
It seems it would be obvious to all but the most ardent Cruz supporters that he watches and sees what resonates with Trump supporters and then tries to coopt that position and claim he was first.