The NLRA as amended would have to be repealed, which would be a good thing, but not likely to happen. When the NLRA was initially passed, it caused so much trouble with strikes that it was necessary to pass further legislation to restrict union behavior (Taft-Hartley). Over the years, this legislation and its continual tweaking have led to a mess of regulation that discourages anything but an adversarial relationship between unions and employers. The arbitrary and capricious rulings of the NLRB have been partisan, generally anti-employer, and now even more so because of Obama's appointments to it.