Doris "Granny D" Haddock was an American politician and liberal political activist from the state of New Hampshire. Between 1999 and 2000, over a span of fourteen months, Haddock walked 3,200 miles across the continental United States to advocate campaign finance reform. In 2004 she ran unsuccessfully as a Democratic challenger to incumbent Republican Judd Gregg for the U.S. Senate.
Haddock's walk across the country followed a southern route and took more than a year to complete, starting on January 1, 1999, in southern California and ending in Washington D.C. on February 29, 2000.
Haddock requested a name change of her middle name to "Granny D", the name by which she had long been known. On August 19, 2004, Haddock's request was officially granted by Judge John Maher during a hearing at the Cheshire County probate court.