[1] Hubbard was educated at home,[2] and engaged in classical studies whilst taught by private tutors,[1] before attending Dartmouth College and graduating from there in 1803.

[2] Early on, Hubbard was a Federalist,[2] but on March 4, 1829, he started as a member of the United States House of Representatives, as a Jackson Democrat.

[1] Hubbard was also the Speaker pro tem in 1834,[2] and he left the House on March 3, 1835, having been elected to the United States Senate as a Democrat.

[1] Hubbard gained the Democratic nomination for Governor of New Hampshire, and was elected by popular vote in 1842, winning re-election in 1843.

[3] As Governor, Hubbard "favored lowering high national protective tariffs, denounced capital punishment, and called for state legislation to curb corporate shareholder profits made at the public expense.