How Mitch McConnell's worn out his welcome with Kentucky voters, in one brutal chart

Senator Mitch McConnell is not very popular in Kentucky. He's in far worse shape than six years ago, when he won with 53 percent of the vote. His job approval ratings took a real hit this fall, although likely they have recovered modestly along with the favorability of Republicans in general. (We don't have enough recent data for McConnell to say anything more than his job approval this winter is worse than it was last summer.)

So what has happened to other incumbents that are this unpopular? Has anybody else in this position been re-elected recently? Will his popularity recover? Follow the discussion below.