Question: Which former U.S. President established Wind Cave National Park?

Context paragraphs:
Wind Cave National Park: Wind Cave National Park is a United States national park 10 mi north of the town of Hot Springs in western South Dakota.  Established in 1903 by President Theodore Roosevelt, it was the seventh U.S. National Park and the first cave to be designated a national park anywhere in the world.  The cave is notable for its displays of the calcite formation known as boxwork.  Approximately 95 percent of the world's discovered boxwork formations are found in Wind Cave.  Wind Cave is also known for its frostwork.  The cave is also considered a three-dimensional "maze cave", recognized as the densest (greatest passage volume per cubic mile) cave system in the world.  The cave is currently the sixth-longest in the world with 140.47 mi of explored cave passageways.  Above ground, the park includes the largest remaining natural mixed-grass prairie in the United States.

National Register of Historic Places listings in Wind Cave National Park: National Register of Historic Places listings in Wind Cave National Park

Theodore Roosevelt: Theodore Roosevelt Jr. ( ; October 27, 1858 – January 6, 1919) was an American statesman, author, explorer, soldier, naturalist, and reformer who served as the 26th President of the United States from 1901 to 1909.  He also served as the 25th Vice President of the United States from March to September 1901 and as the 33rd Governor of New York from 1899 to 1900.  As a leader of the Republican Party during this time, he became a driving force for the Progressive Era in the United States in the early 20th century.  His face is depicted on Mount Rushmore, alongside those of George Washington, Thomas Jefferson, and Abraham Lincoln.

Sitting Bull Crystal Caverns: Sitting Bull Crystal Caverns is a limestone cave complex nine miles south of Rapid City, South Dakota on the way to Mount Rushmore and by the Wind Cave National Park.  For eight decades, the cave was open for the public to tour daily from Memorial Day weekend to Labor Day weekend.

Wind Cave National Park Administrative and Utility Area Historic District: Wind Cave National Park Administrative and Utility Area Historic District

Wind Cave bison herd: The Wind Cave bison herd is a herd of 250–400 American bison in Wind Cave National Park, South Dakota, USA.  It is believed to be one of only four free roaming and genetically pure herds on public lands in North America.  The other three herds are the Yellowstone Park bison herd, the Henry Mountains bison herd in Central Utah, and at Elk Island National Park in Alberta, Canada.  The Wind Cave herd are of the Plains bison subspecies ("Bison bison bison").

Subhyracodon: Subhyracodon is an extinct genus of cow-sized rhinoceroses.  With a length of 2.4 m (8 ft) and a weight estimated of 381.3 kg (in "S. mitis"), it was a tapir-sized herbivore on the plains of early Oligocene South Dakota 33 million years ago (White River Fauna), smaller than only the "Megacerops" and the chalicotheres. "Subhyracodon" had no horns, relying more on its speed to escape, but a species found at Wind Cave National Park had a pair of bony nasal ridges.  The genera "Caenopus" and "Aceratherium" were both synonymized with "Subhyracodon"

Alvin McDonald: Alvin Frank McDonald (1873 – December 15, 1893) was an early American caver and tour guide at what became Wind Cave National Park in South Dakota, the sixth longest cave system in the world, from 1889 to 1893.

Mammoth Cave National Park: Mammoth Cave National Park is a U.S. national park in central Kentucky, encompassing portions of Mammoth Cave, the longest cave system known in the world.  Since the 1972 unification of Mammoth Cave with the even-longer system under Flint Ridge to the north, the official name of the system has been the Mammoth-Flint Ridge Cave System.  The park was established as a national park on July 1, 1941.  It became a World Heritage Site on October 27, 1981, and an international Biosphere Reserve on September 26, 1990.

Rapid City, South Dakota: Rapid City (Lakota: "Mni Lúzahaŋ Otȟúŋwahe" ; "Swift Water City") is the second-largest city in South Dakota (after Sioux Falls) and the county seat of Pennington County.  Named after Rapid Creek, on which the city is established, it is set against the eastern slope of the Black Hills mountain range.  The population was 67,956 as of the 2010 Census.  Known as the "Gateway to the Black Hills" and the "City of Presidents", it is split by a low mountain ridge that divides the western and eastern parts of the city.  Ellsworth Air Force Base is located on the outskirts of the city.  Camp Rapid, a part of the South Dakota Army National Guard, is located in the western part of the city.  The historic "Old West" town of Deadwood is nearby.  In the neighboring Black Hills are the popular tourist attractions of Mount Rushmore, the Crazy Horse Memorial, Custer State Park, and Wind Cave National Park.

Supporting paragraphs: Wind Cave National Park Theodore Roosevelt
Answer: Theodore Roosevelt