Hasn't  the real  issue of free movement  been a hot spot issue in those type of towns like the North East ,run down coastal areas where the jobs are low skilled, housing, health,school are already at a pinch points , these were seen as the UKIP breeding grounds,  and I think this is being seen else where in the world, and I think that was the point Clinton was offering ,to fair she may have a point 
Hillary Clinton: Europe must curb immigration to stop rightwing populists
https://www.theguardian.com/world/20...y_to_clipboard