If the republicans win the senate, then he would be essentially powerless.
Well not powerless, as he’s shown he will completely ignore the limits of the constitution.
The republicans will retake the Senate this fall, that is a given, the only question is by how many seats.
This will further limit what Obama can do, but don’t think anything short of throwing him out of office will force him to obey the law... and that only happens if DEMOCRATS turn on him.