Question: Which party did the politician elected to Congress in 1847 belong to for the city located on the Mississippi River near its confluence with the Chippewa River?

Context paragraphs:
Phoenix Park (Eau Claire, Wisconsin): Phoenix Park is a public space in downtown Eau Claire, Wisconsin, located on a former brownfield site at the confluence of the Chippewa River and the Eau Claire River.  It covers approximately 9 acres with approximately 1/2 mile of riverbank frontage.  The park serves as the trailhead for the Chippewa River State Trail.  The park also offers a walking labyrinth, a natural amphitheater, and is home to Eau Claire's year-round farmer's market.  These amenities make Phoenix Park a major gathering spot, especially during the summer months when the park plays hosts to concerts.  The park is owned and operated by the City of Eau Claire.

Eau Claire River (Chippewa River): The Eau Claire River is a tributary of the Chippewa River in west-central Wisconsin in the United States.  It is one of three rivers by this name in Wisconsin.  Via the Chippewa River, it is part of the Mississippi River watershed.  Its name is the French translation from the Ojibwe "Wayaa-gonaatigweyaa-ziibi" (Clear potable-water River).

Couderay River: The Couderay River is a tributary of the Chippewa River in northwestern Wisconsin in the United States.  Via the Chippewa River, it is part of the Mississippi River watershed.  It flows for its entire length in Sawyer County.  Its name is derived from the French "Rivière des Courte Oreilles" (River of the "Short Ears").

Eau Galle River: The Eau Galle River is a tributary of the Chippewa River in western Wisconsin in the United States.  It is about 35 mi (56 km) long.  Via the Chippewa River, it is part of the Mississippi River watershed.

Wabasha, Minnesota: Wabasha is a city in Wabasha County, Minnesota, United States.  The population was 2,521 at the 2010 census.  Located on the Mississippi River near its confluence with the Chippewa River, it is the county seat.

Namekagon Portage: The Namekagon Portage (sometimes referred to as the "Namekagon Court Oreilles Portage") was a well known canoe portage connecting the St. Croix River watershed to the Chippewa River watershed and was located about five miles south of the present day city of Hayward in Sawyer County, Wisconsin.  The portage ran approximately two and one-half miles from the Namekagon River (in the St. Croix River watershed) to Windigo Lake in the Chippewa River watershed.  The route then proceeded from Windigo Lake through Grindstone Lake to Lac Courte Oreilles where a well known Ojibwa village was located.  This portage was used as one of the alternative routes to the Mississippi River for persons passing from Lake Superior to the Mississippi River by way of the Bois Brule River, as described below.

John Van Dyke (politician): John Van Dyke (April 3, 1807 in Lamington, Somerset County, New Jersey – December 24, 1878 in Wabasha, Minnesota) was an American jurist and Whig Party politician who represented  's 4 congressional district in the United States House of Representatives from 1847 to 1851.

Chippewa River State Trail: Chippewa River State Trail is a 26-mile urban-rural trail system in western Wisconsin that follows the path of the Chippewa River.  The trails runs from the spot of the confluence of the Chippewa with the Eau Claire River, at Phoenix Park in downtown Eau Claire to the town of Durand where it meets up with the Red Cedar State Trail.  A former railroad corridor, the trail passes through a variety of habitat including wetlands, prairies, and sandstone bluff.

Shakopee Creek: Shakopee Creek is a 48.6 mi tributary of the Chippewa River of Minnesota, United States.  It is part of the Minnesota River drainage basin, flowing to the Mississippi River.  It rises in Kandiyohi County at the outlet of Andrew Lake, with its major headwaters being an outlet from Games Lake about 7 miles (11 km) west northwest of New London.  From Andrew it flows westerly into Swift County, where it passes near Kerkhoven.  The creek briefly dips southward into Chippewa County, then reenters Swift County and continues to its mouth at the Chippewa River, 8 mi southwest of Benson.

Chippewa River (Wisconsin): The Chippewa River in Wisconsin flows approximately 183 miles (294 km) through west-central and northwestern Wisconsin.  It was once navigable for approximately 50 miles (80 km) of its length, from the Mississippi River, by Durand, northeast to Eau Claire.  Its catchment defines a portion of the northern boundary of the Driftless Area.  The river is easily accessible for bikers and pleasure seekers via the Chippewa River State Trail which follows the river from Eau Claire to Durand.

Supporting paragraphs: John Van Dyke (politician) Wabasha, Minnesota
Answer: Whig