Question: Which president signed this act that led to Choctaw tribe of Native Americans being forced to move out of Choctaw County by federal troops in 1830?

Context paragraphs:
Choctaw County, Alabama: Choctaw County is a county of the U.S. state of Alabama.  As of the 2010 census, the population was 13,859.  The county seat is Butler.  The county was established on December 29, 1847 and named for the Choctaw tribe of American Indians.

Choctaw horse: The Choctaw Horse is a horse breed from the state of Mississippi in the United States that was originally used by the Choctaw tribe of Native Americans.  To the Choctaw, this particular breed of horse was symbolic of wealth, glory, honor, and prestige.  They were also used for barter.  This breed is rare.

Ackerman, Mississippi: Ackerman is a town in Choctaw County, Mississippi, United States.  The population was 1,510 at the 2010 census, down from 1,696 at the 2000 census.  It is the county seat of Choctaw County.

Doaksville, Choctaw Nation: Doaksville is a former settlement, now a ghost town, located in present-day Choctaw County, Oklahoma.  It was founded between 1824 and 1831, by people of the Choctaw Indian tribe who were forced to leave their homes in the Southeastern United States and relocate in an area designated in for their resettlement in Indian Territory.  The community was named for Joseph Doak, co-owner of the local trading post.  The town flourished until the U.S. Army abandoned nearby Fort Towson in 1854, though it remained as the Choctaw capital until 1859, then declined precipitately after being bypassed by a new railroad in 1870.  It is now a ghost town and an archaeological preservation site.

Fort Towson, Oklahoma: Fort Towson is a town in Choctaw County, Oklahoma, United States.  The population was 510 at the 2010 census, a 15.1 percent decline from 611 at the 2000 census.  It was named for nearby Fort Towson, which had been established in May 1824 and named for General Nathan Towson, a hero of the War of 1812.  The town of Fort Towson was established in 1902, after the Arkansas and Choctaw Railway reached eastern Choctaw County.

Indian Removal Act: The Indian Removal Act was signed by President Andrew Jackson on May 28, 1830.  The law authorized the president to negotiate with southern Indian tribes for their removal to federal territory west of the Mississippi River in exchange for their lands.  The act enjoyed strong support from the non-Indian peoples of the South, but there was a large amount of resistance from the Indian tribes.  Cherokee tribes came together as an independent nation to stop this relocation, but they were unsuccessful.

Greenwood LeFlore: Greenwood LeFlore or Greenwood Le Fleur (June 3, 1800 – August 31, 1865) was elected Principal Chief of the Choctaw in 1830 before removal.  Before that, the nation was governed by three district chiefs and a council of chiefs.  A wealthy and regionally influential Choctaw of mixed-race, who belonged to the Choctaw elite due to his mother's rank, LeFlore had many connections in state and federal government.  In 1830 LeFlore led other chiefs in signing the Treaty of Dancing Rabbit Creek, which ceded the remaining Choctaw lands in Mississippi to the US government and agreed to removal to Indian Territory.  It also provided that Choctaw who chose to stay in Mississippi would have reserved lands, but the United States government failed to follow through on this provision.

Choctaw County, Mississippi: Choctaw County is a county located in the central part of U.S. state of Mississippi.  As of the 2010 census, the population was 8,547.  Its northern border is the Big Black River, which flows southwest into the Mississippi south of Vicksburg.  The county seat is Ackerman.  The county is named after the Choctaw tribe of Native Americans, who long occupied this territory as their homeland before being forced to move west of the Mississippi River by federal troops under the Indian Removal Act of 1830.

Mississippi Band of Choctaw Indians: The Mississippi Band of Choctaw Indians is one of three federally recognized tribes of Choctaw Native Americans.  On April 20, 1945, this band organized under the Indian Reorganization Act of 1934.  Also in 1945 the Choctaw Indian Reservation was created in Neshoba, Leake, Newton, Scott, Jones, Attala, Kemper, and Winston counties in Mississippi.  The Mississippi Band of Choctaw Indians is the only federally recognized Native American tribe in the state.

Dancing Rabbit Creek Treaty Site: The Dancing Rabbit Creek Treaty Site is a historic Choctaw Native American gathering place in rural Noxubee County, Mississippi.  Located near a freshwater spring above the floodplain of Dancing Rabbit Creek in the southwestern part of the county, it was the site of a treaty negotiation between the Choctaw and the federal government in 1830, resulting in the Treaty of Dancing Rabbit Creek, in which the Choctaw agreed to surrender their ancestral lands for territory in what is now Oklahoma.  It was the first treaty negotiated after passage of the Indian Removal Act, and served as a model for other treaties passed pursuant to that act.  It also led to the Choctaw Trail of Tears.  The site, now marked by a stone memorial and a small Choctaw cemetery, was designated a National Historic Landmark in 1996.

Supporting paragraphs: Choctaw County, Mississippi Indian Removal Act
Answer: President Andrew Jackson