Trump's Muslim rhetoric key issue in travel ban rulings

SEATTLE (AP) — Federal law gives the president broad authority over immigration. Jimmy Carter used it to deny some Iranians entry to the U.S. during the hostage crisis, Ronald Reagan to bar Cubans who didn’t already have relatives here and President Barack Obama to keep out North Korean officials.
So why does President Donald Trump keep running into legal trouble with his efforts to freeze immigration by refugees and citizens of some predominantly Muslim nations?
When federal courts