Boldface (with superscript C) numbers indicate the majority Party in each house. Red (with superscript P) numbers (boldface or not) indicate the Party of the President in any event.
| President | Party | Congress | United States Senate | House of Representatives | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Republican | Federalist | other | vacancies | Republican | Federalist | other | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Jefferson | Republican | 7th 1801-1803 | 16CP | 15 | 1 | 64CP | 42 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
7th CONGRESS- in General SENATE: 16 Republicans, 15 Federalists, 1 Law and Order OHIO was admitted as the 17th State of the Union on 1 March 1803: the General Assembly of the State did not elect either of its Senators nor its Representative in Congress prior to the expiration of the 7th Congress on 3 March 1803; however, as the date of Ohio's admission was well after the end of the odd-numbered year in which that Congress took office [this being 1801], Ohio's 2 Senators would NOT have been counted among those elected to the Senate of the 7th Congress in any event; neither would Ohio's 1 Congressman have been counted among those elected to the House of Representatives in that Congress. 7th CONGRESS- United States SENATE The Senate of the 7th Congress included 1 Senator not elected to that body as a member of either of the two Major Parties, as follows:
Robert Wright, a Republican, was elected by the General Assembly of the State of MARYLAND to the Class 3 seat (term: 4 March 1801 to 3 March 1807) from that State on 19 November 1801, before the end of the odd-numbered year in which the 7th Congress took office. Senator Wright, therefore, is counted among the 16 Republicans elected to the Senate of the 7th Congress, notwithstanding the existence of a vacancy at the start of that Congress [4 March 1801] due to a failure of that State's legislature to elect. 7th CONGRESS- HOUSE of Representatives
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Modified .