The 28th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1843, to March 4, 1845, during the third and fourth years of John Tyler's presidency. The apportionment of seats in this House of Representatives was based on the 1840 United States census. The Senate had a Whig majority, and the House had a Democratic majority.

The 29th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1845, to March 4, 1847, during the first two years of James Polk's presidency. The apportionment of seats in the House of Representatives was based on the 1840 United States census. Both chambers had a Democratic majority.