Question: I. T. Montgomery House was home to a former slave of a politician who served in what post?

Context paragraphs:
Montgomery House (Wilmington, Delaware): Montgomery House is a historic home located near Wilmington, New Castle County, Delaware.  It was built in 1789, and is a two- to three-story, three bay wide, gable roofed, Penn Plan banked dwelling of uncoursed fieldstone.  It has a two-story frame addition at the south side of the house that dates from the 1950s.  Also on the property are a contributing frame stable and a small frame well house.

Isaiah Montgomery: Isaiah T. Montgomery (May 21, 1847 – March 5, 1924) was the son of Ben Montgomery, and the founder of Mound Bayou, Mississippi.  Soon elected mayor, he was an active politician, even participating in the 1890 Mississippi constitutional convention which adopted a state constitution that disfranchised black voters for decades, using poll taxes and literacy tests.  He was seen as promoting an accommodationist position, a position which would soon be shared by another former slave and eventual black leader Booker T. Washington.

Walter Scott Montgomery House: Walter Scott Montgomery House is a historic home located at Spartanburg, Spartanburg County, South Carolina.  It was designed by noted architect George Franklin Barber and built in 1909.  It is a 2 1/2-story, frame, yellow brick-veneer residence in the Colonial Revival style.  building is of frame construction with a yellow brick veneer and a red tile roof.  It features a distinctive portico and leaded glass windows.  Also on the property is a one-story, reinforced concrete auto garage (c. 1923).

Montgomery House Bed and Breakfast: Reported to be one of the most haunted locations in Kalama, Washington, by townsfolk and former occupants, Montgomery House Bed and Breakfast was built in 1908 on former Cowlitz Indian land in Kalama, Washington, a logging town along the Columbia River now known for its antiques.  Montgomery House Bed and Breakfast was the subject of the 2009 feature film documentary "Montgomery House: The Perfect Haunting" written and directed by psychic and medium Danielle Egnew.

General William Montgomery House: Gen. William Montgomery House is a historic home located at Danville in Montour County, Pennsylvania.  It is a 2 ⁄ -story stone house with a pedimented gable roof.  The main house is three bays by two bays.  Attached to the stone structure is a gable-roofed, 2 ⁄ -story log and frame structure, thought to have been the original Montgomery House and constructed about 1777.  It was the home of the developer of Danville, Gen. William Montgomery (1736–1816).

I. T. Montgomery House: The I. T. Montgomery House is a historic house on West Main Street in Mound Bayou, Mississippi, United States.  Built in 1910, it was the home of Isaiah Montgomery (1847-1924), a former slave of Jefferson Davis who was instrumental in founding Mound Bayou, one of the first economically successful towns established by freed slaves.  It was declared a National Historic Landmark in 1976, and a Mississippi Landmark in 2003.

Montgomery House (Montgomery, Vermont): The Montgomery House is a historic travel accommodation on Vermont Route 118 in the center of Montgomery, Vermont.  Built in 1803, it is one of the town's oldest buildings, and it served for many years as a social and civic center in the small community.  It was listed on the National Register of Historic Places in 1992.

Jefferson Davis: Jefferson Davis (born Jefferson Finis Davis; June 3, 1808 – December 6, 1889) was an American politician who served as the President of the Confederate States from 1861 to 1865.  He was a member of the Democratic Party who represented Mississippi in the United States Senate and the House of Representatives prior to becoming president of the Confederacy.  He was the 23rd United States Secretary of War, serving under U.S. President Franklin Pierce from 1853 to 1857.

T. Harlan and Helen Montgomery House: T. Harlan and Helen Montgomery House is a historic home located at Seymour, Jackson County, Indiana.  It was built between 1922 and 1929, and is a two-story, Dutch Colonial Revival style frame dwelling with a gambrel roof.  It consists of a main rectangular block with a small portico, side porch, rear ell, and porte cochere.  Also on the property is a contributing garage constructed in 1926.

James Withrow House: James Withrow House, also known as the John Montgomery House, is a historic home located at Lewisburg, Greenbrier County, West Virginia.  It was built about 1818, and is two-story brick house with a two-story brick wing.  It features a large double portico supported by massive plastered brick columns reaching to a high pediment.  Also on the property is a two-story building housing a kitchen and servants quarters, and a plastered brick building that was used as an office by James Withrow II.

Supporting paragraphs: I. T. Montgomery House Jefferson Davis
Answer: President of the Confederate States