Question: What grocery store owner and politician had legendary battles with George Roby Dempster?

Context paragraphs:
Elwyn Nicholson: Elwyn John Nicholson (December 11, 1923 – September 28, 2014) was a grocery store owner from Jefferson Parish, Louisiana, who served as a Democrat in the Louisiana State Senate from District 8 from 1972 to 1988 during the first three administrations of Governor Edwin Edwards and the interceding term of Republican David C. Treen.  He was best known for his advocacy of the creation of Jean Lafitte National Historical Park and Barataria Preserve.

Dempster Brothers: Dempster Brothers, Inc. of Knoxville, Tennessee, was an industrial firm that made waste handling vehicles including the Dempster Dumpmaster and Dempster Dinosaur.  The firm was originally established by George Roby Dempster with his brothers Thomas and John Dempster.

Jerry Newton (politician): Gerald F. "Jerry" Newton (born September 15, 1937) is a Minnesota politician and member of the Minnesota State Senate.  A member of the Minnesota Democratic–Farmer–Labor Party (DFL), he represents District 37, which includes portions of Anoka County in the northern Twin Cities metropolitan area.  He is also a former grocery store owner and career soldier.

George Roby Dempster: George Roby Dempster (September 16, 1887 – September 18, 1964) was an American businessman, inventor, and politician, active primarily in Knoxville, Tennessee, during the first half of the twentieth century.  Dempster is best known for the invention of the Dempster-Dumpster, a now-commonly-used trash receptacle that can be mechanically emptied into garbage trucks.  During the 1910s and 1920s, the Dempster Brothers Construction Company, operated by Dempster and his brothers, built a number of roads and railroads across the Southern Appalachian region.  Dempster also served as a city manager and mayor of Knoxville, where he became legendary for his political battles with eccentric Knoxville businessman Cas Walker and "Knoxville Journal" editor Guy Smith, Jr.

Bowery Street Grocery Store: The Bowery Street Grocery Store, also known as Helmer's Grocery and as the New Pioneer Food Cooperative, is a historic building located on the far west side of Iowa City, Iowa, United States.  The building's construction is consistent with those built in the mid-19th century.  The single-story wood frame structure with the false front was a popular commercial style building that was built in Iowa from that time period.  Beginning about 1897 the city directory lists this location as a meat market and grocery store.  It would continue to house that type of business, under a variety of owners or renters until 1975.  In addition to a retail establishment, it also served as a meeting place for people in the neighborhood.  The New Pioneer Food Cooperative was last grocery to occupy the space until is relocated to a larger facility.  The building was listed on the National Register of Historic Places in 2014.

Cas Walker: Orton Caswell "Cas" Walker (March 23, 1902 – September 25, 1998), was a Tennessee businessman, politician, and personality on television and radio.  Walker founded a successful chain of small grocery stores that grew to include several dozen stores scattered throughout the Knoxville, Tennessee vicinity as well as parts of Virginia and Kentucky.  From 1941 through 1971, Walker served on the Knoxville city council where he became legendary for his uncompromising political stances and his vehement opposition to what he claimed was a corrupt elitism in the city's government.  "The Cas Walker Farm and Home Hour", a local variety show sponsored by Walker, ran in various radio and television formats between 1929 and 1983 and helped launch the careers of entertainer Dolly Parton and the Everly Brothers.

Weavers Way Co-op: Weavers Way Co-op is a member-owned consumers' cooperative with stores open to everyone, based in Northwest Philadelphia.  Founded in 1973 as a neighborhood food buying club in a church basement in Philadelphia's West Mt. Airy section, Weavers Way has grown to more than 5,200 member households, with annual sales of nearly $20 million.  After moving to its location at 559 Carpenter Lane, Weavers Way expanded, purchasing the adjacent building and consolidating the two buildings.  Subsequent expansions included the purchase of other buildings in the neighborhood, which house a pet supply store, health and wellness store and offices.  In 2010, Weavers Way underwent a major expansion, adding a second grocery store in Chestnut Hill, at 8424 Germantown Ave., at the former Caruso's grocery store site.  Then, in 2013, Weavers Way opened a health and beauty specialty store, also in Chestnut Hill.  For several years, Weavers Way also ran a smaller store in the West Oak Lane section of Philadelphia, but that closed in September 2011.  The Co-op rents warehouse space in the SHARE food pantry complex in the Nicetown neighborhood.  Two farm operations comprise 5.5 acres, one at Awbury Arboretum in Germantown and one on the grounds of Saul Agricultural High School in Roxborough.  Weavers Way has participated in such events and organizations as Mt. Airy Day, Mt. Airy ArtJam, Mt. Airy YouthWorks, Mt. Airy Business Association, Mt. Airy USA (MAUSA), Mt. Airy Village Fair, Chestnut Hill's Fall for the Arts Festival and the XPoNential Music Fest.

Fred Gottschalk Grocery Store: The Fred Gottschalk Grocery Store is a historic grocery store building located at 301 West Edwards Street in Springfield, Illinois.  Fred Gottschalk opened his first store at the site in 1887; he built the present building in 1898.  The brick building has a Commercial style design with a cast iron storefront and a corbelled cornice.  The store, one of several groceries in the area, served many of Springfield's prominent politicians and their families; it also allowed its customers to purchase goods by telephone.  Gottschalk and his son Arthur ran the store until 1971; the building is now one of the few surviving neighborhood groceries in Springfield.

Bi-Rite Market: Bi-Rite Market is a grocery store in San Francisco, California, owned and operated by chef Sam Mogannam, who had previously worked at Jardinière in the city.  He and his brother Raphael took over the grocery store from his family in 1997, and began to sell prepared foods using locally grown produce, which he advocates.  Mogannam spoke at TEDxPresidio 2012 on reinventing capitalism. " Fast Company" profiled him as one of the 100 most creative people in business for 2012.  The market runs a non-profit community food education project, 18 Reasons.  The store is a pioneer in the new farm-to-grocery store movement, and has published a book, "Eat Good Food" (Ten Speed Press).  Whole Foods Market has sent staff to the store to adopt practices from there.  The store opened a second location, in the Divisadero Street Commercial District, in the Western Addition neighborhood, in 2013.

The Market (company): The Market: A Farm Fresh Supermarket was a high end concept grocery store catering specifically to urban customers.  It was owned and operated by Virginia Beach, Virginia-based Farm Fresh Food & Pharmacy.  The Market had three locations, two of which were in Norfolk, Virginia, and the original location in Richmond, Virginia.  The first store was an independently owned and operated grocery store which closed due to financial problems.  The store's distributor, SuperValu, required that the store be reopened and handed operations over to FF Acquisitions LLC.

Supporting paragraphs: George Roby Dempster Cas Walker
Answer: Cas Walker