He represented several seats in the House of Commons of England between 1681 and 1698, when he was killed in a duel with Oliver Le Neve.

[6] Hobart served as a Gentleman of the Horse to William III during the Williamite War in Ireland and fought under him in the Battle of the Boyne.

In 1695 he was returned again for Norfolk when he continued to vote in support of the king's ministry and was a leader of the Rose Club.

[6] Following the 1696 Jacobite assassination plot, Hobart successfully lobbied the Privy Council for the arrest of his local rival, Sir Christopher Calthorpe.

[6] In April 1697, he was promised the role of commissioner of customs by the Earl of Sunderland, but Sir John Austen was appointed instead.

[6] In 1698, Hobart attempted for a third time to bring in a bill to limit the wearing of imported Indian cloth, but he was defeated.

However, Le Neve struck back and injured his opponent so badly that he died the next day at Blickling Hall.