In 1838, what did President Martin Van Buren do to expedite the removal of the Cherokees?

President Martin Van Buren approved the Treaty of New Echota, which was signed by a small faction of Cherokees who did not represent the majority of the tribe. This treaty allowed for the forced removal of the Cherokees from their ancestral lands in the Southeast to Indian Territory (present-day Oklahoma) along the Trail of Tears.