Despite his failing health Mordaunt, a pro-Catholic Whig who had long adapted his politics to appease his constituents, stood again for his county at the general election of 1820 and was returned unopposed.
Mordaunt, whose devoted wife (d. 1842) conceded that he was ‘never perhaps sufficiently attached’ to the duties of public life, preferring ‘enjoyment of nature’ and ‘domestic affection’, fell so grievously ill later that year that he resigned his seat.
