Changing Immigration Policy: Impact of Zero Tolerance Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Immigration courts backlogged by years of staffing shortages and tougher enforcement face an even more daunting challenge since tens of thousands of Central Americans began arriving on the border. ( AP Photo/Eric Gay, Pool, File ) Hosted by Tanzina Vega Produced by PRI and WNYC