| BALANCE OF POWER IN THE UNITED STATES SENATE BETWEEN THE FREE AND THE SLAVE STATES | ||
|---|---|---|
| FREE. | SLAVE. | |
| Pennsylvania. | Delaware. | The original thirteen states. |
| New Jersey. | Georgia. | |
| Connecticut. | Maryland. | |
| Massachusetts. | South Carolina. | |
| New Hampshire. | Virginia. | |
| New York. | North Carolina. | |
| Rhode Island. | ||
| 7 | 6 | |
Vermont, 1791. |
Kentucky, 1792. | |
| Ohio, 1802. | Tennessee, 1796. | |
| Indiana, 1816. | Louisiana, 1812. | |
| Illinois, 1818. | Mississippi, 1817 | |
| Alabama, 1819. | ||
| 11 | 11 | The Missouri Compromise, 1820. |
| Maine, 1820. | Missouri, 1821. | |
| Arkansas, 1836. | ||
| 12 | 13 | First slave state majority. |
| Michigan, 1837. | Florida, 1845. | |
| Iowa, 1846. | Texas, 1845. | Last slave state. |
| Wisconsin, 1848. | ||
| 15 | 15 | |
| California, 1850. | Compromise of 1850. | |
| 16 | 15 | Kansas-Nebraska Bill, 1854. The last chance for the South to win. |
| Minnesota, 1858. | ||
| Oregon, 1859. | ||
| Kansas, 1861. | ||
| 19 | 15 | Secession and the Civil War. |