He did, and is daring Congress to put their name on it. Him just ending it would not forbid them from trying to do it on the sly.
Now you can do your job by controlling your congresscritter., Now that it is in the open.
No, he is not daring them to do anything. It is clear that he will sign rather than veto their bill. By saying he will revisit it if they don’t make it a permanent and legal amnesty in the next six months he is saying that he won’t let it expire on its own.
But no worry, there are certainly enough safe Republicans to pass it with the Dems.
This is a total Jivanka victory.