A 2007 article in the Administrative Law Review noted how some federal agencies» usage of signing statements may not withstand legal challenges under common law standards of judicial deference to agency action. (en.wikipedia.org)
That's because the White House is apparently rewriting the controversial executive order — which temporarily bans immigration from six predominantly Muslim countries and permanently from Syria — so that it has a better chance of withstanding legal challenges. (businessinsider.com)
These actions have so far withstood legal challenges, although the matter remains tied up in court. (nystateofpolitics.com)