St. John, who practised on the western circuit until he succeeded to the peerage, sat undisturbed in this period for Bedfordshire, where his family interest was reinforced by the support of the 5th and 6th Dukes of Bedford. In 1806 Lord Guilford described him as ‘the beloved apostle’ of Fox, to whom he remained utterly loyal throughout his career in the Commons.
He condemned the war in India, 2 Mar. 1791, voted against government on the Oczakov question, 12 Apr., and seconded Baker’s motion on the same subject, 15 Apr. He was listed favourable, the same month, to repeal of the Test Act in Scotland. He protested against Burke’s introduction of general principles into the debate on the Quebec bill, 6 May, and threatened to take the sense of the House on his conduct. As one of the managers of Hastings’s impeachment he moved the fourth article of the charges, 23 May 1791, in language described by William Elliot as ‘very neat and perfectly adapted to his style of speaking’. In his last reported speech for over three years, 29 Feb. 1792, he again deplored the armament against Russia. He was one of the minority of 50 who voted for Fox’s amendment to the address, 13 Dec. 1792, voted against the war, 18 Feb., and for Grey’s parliamentary reform motion, 7 May 1793, and continued to divide regularly with the Foxite opposition before and after the junction of the Portland Whigs with government. He questioned the adequacy of British forces in the West Indies, 15 June 1795, and on 18 May 1797 moved an address to the King calling for their withdrawal, which was defeated by 116 votes to 31. The Duke of Portland commented that he had been told ‘by several of my own friends and have heard from other general friends of administration that St. John must have been paid by us for making his motion’.
In January 1797 St. John had favoured an attempt to mobilize public opinion against government,
St. John voted against government in the larger minorities of early 1801 as the Whigs began to drift back, and divided regularly with the Foxite opposition to Addington in 1801 and 1802, but his only known speeches in this period were brief affairs on matters arising from election petitions, 13 and 21 Dec. 1802. He visited France when peace was concluded and Lady Ossory told Lord Holland, 6 Feb. 1803, that he was ‘not at all altered in costume, or manner since being at Paris; still full of its charms and comforts, although, he does allow with all the splendour, the windows do not shut quite so well as those in England’.
As a peer, St. John accepted an ill-paid and undemanding Household office, together with a privy councillorship, under the ‘Talents’, at ‘the earnest solicitation of Mr Fox, and merely with the object of obliging him’. He was soon reported to be ‘so dissatisfied’ that he was talking of resignation, but he did not carry out his threat and remained loyal to the opposition after 1807.
