*Party division totals are based on election day results.
The 9th Congress (1805–1807), made up overwhelmingly of Jeffersonian Republicans, demonstrated its independence when caustic Virginia Representative John Randolph successfully delayed a secret appropriation to buy West Florida. British attacks on U.S. shipping during its war with France led Congress to pass legislation prohibiting the importation of British goods, with the assumption that the resulting economic loss would force Britain to back off. The 9th Congress also followed up on a constitutional provision (Art. I, sec. 9) and passed legislation to prohibit the importation of slaves beginning in 1808.