WASHINGTON — The Supreme Court on Monday will hear a major challenge to President Obama’s plan to shield millions of immigrants from deportation and allow them to work. The case, brought by 26 states, may produce a significant ruling on presidential power and immigration policy in the midst of a presidential campaign in which both issues have been front and center.

The case, United States v. Texas, No. 15-674, is being heard by an eight-member court, and the absence of Justice Antonin Scalia, who died in February, has altered the judicial dynamic. A 4-4 deadlock is now a live possibility, one that would leave in place an appeals court ruling that blocks the plan without setting a Supreme Court precedent.(nytimes.com)…[+]