This weekend, dozens of Southern Californians plan to march in Washington for immigration reform, joining thousands of activists from around the country. Today, a different group of Southern Californians – members of the L.A. Area Chamber of Commerce – heard from a U.S. senator who took a lot of political heat for his efforts at immigration reform. The question arose at lunch during the Chamber’s annual lobbying trip to Washington. What did Republican Senator John McCain of Arizona think the U.S. should do about the “flood of immigrants” “running over” California? McCain cosponsored the last major immigration reform bill with...