Montagu was returned as
Member of Parliament for
Westminster in 1722 as a government supporter. He did not stand in
1727. At the
1734 general election,
Richard Eliot brought him in as MP for
St Germans. He became a supporter of
Frederick, Prince of Wales, who appointed him Auditor general of the
Duchy of Cornwall in 1735, and auditor of the household to Prince of Wales in 1738. He did not vote on the Spanish convention in 1739 or the place bill in 1740, and withdrew on a motion to remove Walpole in February 1741. At the
1741 general election, he was returned as MP for
Camelford by
Thomas Pitt who acted as the Prince's election manager. Montagu always voted with the Prince's party. At the
1747 general election, called by the King to challenge the Prince's opposition, Pitt tried to put Montagu up for Okehampton, but his initial hopes of success were thwarted by strong opposition there. ==Death and legacy==