By Kevin Sieff
MATAMOROS, Mexico — When Princess Martinez saw her husband for the first time after he was deported, two thoughts crossed her mind: that she loved this man, and that she might have to leave him.
The only other option appeared to be moving with their six daughters — who, like Martinez, are all U.S. citizens — across the border to her husband’s new home in Mexico, with its mounting violence and troubled schools.
“Everyone is coming to America, to the land of opportu...