Section 1325! Section 1325! For a few crucial minutes in the middle of the first Democratic presidential debate, Julián Castro (polling average: 0.8 percent) took over the proceedings by challenging his fellow candidates to endorse the repeal of Section 1325 of the Immigration and Naturalization Act. What’s it about? Don’t ask. He yelled at Beto O’Rourke about it and expressed his deep disappointment that O’Rourke wasn’t joining him in supporting the repeal of Section 1325. O’Rourke is at 3.3 percent in the Real Clear Politics polling average, so you can see why Castro thought it was so important to nail...