President Obama whipped up a crowd of supporters yesterday in Las Vegas, commending both Houses of Congress for taking up immigration reform. He laid down what he called "key markers" to guide immigration reform, adding that if Congress fails to move in "a timely fashion" he'll send up his own bill and demand immediate action. But today's bipartisanship may or may not produce tomorrow's compromise, and everybody agrees that the devil is in the details. If 11 million illegal residents get a "path to citizenship," how many hurdles should they have to jump? How long should it take? Will they have to wait until the border's secure? When will that be? We hear the pros and cons from a former head of the Immigration Service and others.