Politicans do not pick voters..the voters pick the politicans

President Obama speaking in Illinois on February 10th 2016 said politicans do not pick the voters, the voters pick the politicans.  I think that statement should be true don t you ? For the second election cycle in a row, democrats have chosen an outsider to represent them on the ballot.This time the candidate is from Brooklyn.  The candidate spends more time there than in this district..shouldn't that candidate be representing people from Brooklyn rather than the people of the  19th congressional district of new york? the democratic candidate chose the voters..the primary vote was hardly a mandate for her candidacy.the voters were not just paying enough attention..