President Obama answers questions during his news conference at the White House on Tuesday. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

American farms like this iceberg lettuce field owned by Duda Farm Fresh Foods outside Salinas, Calif., are facing a dwindling supply of farmworkers from rural Mexico. Kirk Siegler hide caption

itoggle caption Kirk Siegler

Gov. Jerry Brown in January calls for federal judges to return control of California prisons to the state. This month, a federal appeals court denied Brown's request and ordered the state to reduce its prison population immediately. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP