[1] He studied law, was admitted to the bar and commenced practice in New York.

[2] He was a member of the New York convention which ratified the United States Constitution in 1788.

[2] Hobart was elected to the United States Senate from New York as a Federalist in 1798 to fill the vacancy caused by the resignation of United States Senator Philip Schuyler and served from January 11 to April 16, 1798, when he resigned to accept a federal judicial post.

[2] Hobart was nominated by President John Adams on April 11, 1798, to a seat on the United States District Court for the District of New York vacated by Judge Robert Troup.

[1] He was confirmed by the United States Senate on April 12, 1798, and received his commission the same day.