
ADDED: The story at the top left, by Michael D. Shear, is "Obama, Daring Congress, Acts to Overhaul Immigration." That headline stresses the political interplay with Congress, not the reason for independent presidential action or the legal argument for it. The first words of the article are: "President Obama chose confrontation...."
The story that goes with the picture of Reagan is "Obama’s Immigration Action Has Precedents, but May Set a New One," by Julie Hirshfield Davis. This article addresses the legal argument, which looks at past presidential actions:
Although Mr. Obama is not breaking new ground by using executive powers to carve out a quasi-legal status for certain categories of unauthorized immigrants — the Republican Presidents Dwight D. Eisenhower, Ronald Reagan and George H. W. Bush all did so — his decision will affect as many as five million immigrants, far more than the actions of those presidents.At that link, the photo of Reagan is uncropped, and the figure standing right behind Reagan is George H.W. Bush.