Offer an explanation for why the Brexit vote and Donald Trump's election surprised many people, and criticize a specific pollster's response to the outcome.
I suggest that both the Brexit vote and Trump's election were due to bad polling.  A lot of people (enough to change the outcome) wanted to "send a message" with their vote, never anticipating the cumulative effect because they believed the polls to be accurate.  (Silly them.)
It's a bit rich to read that pollster Nanos is laying the blame for the unpleasant results on unresponsive politicians.