Could Not Get Elected Dogcatcher Meaning

(idiomatic, US, politics) Is unpopular, particularly of politicians.

Example: 1889, Weekly Courier Journal (Louisville, Kentucky):
  [president Grover Cleveland is] so unpopular in Washington that he could not be elected dog catcher for the district.
2007, Robert Ludlum, The Bancroft Strategy, page 348
  Men like him couldn't get elected dogcatcher. He was a natural lieutenant, not a leader, and it was a fact he accepted with neither bitterness nor regret.