Bolingbroke succeeded to the peerage on the death of his brother following a lengthy, if unimpressive, career as Member for Bedford. Marked variously doubly worthy, and worthy by Anthony Ashley Cooper, earl of Shaftesbury, in 1676, and in 1679 as a supporter of the opposition, St John was kept out of the commission of the peace for Bedfordshire during the ascendancy of Thomas Bruce, 2nd earl of Ailesbury, the St Johns’ principal rival in the county.
Ostensibly succeeding to a substantial estate based in Bedfordshire, Bolingbroke soon found himself in financial straits; the overriding theme of his tenure of the earldom is one of pecuniary embarrassment. Almost immediately on inheriting the earldom he was embroiled in a suit in chancery with his cousin Sir St Andrew St John‡, co-executor with Bolingbroke of the former lord’s will. St John accused him of seeking to overturn the will by suggesting that his brother, Oliver St John, earl of Bolingbroke, had not been in his right mind when he made it.
Opposed to James II’s policies, Bolingbroke welcomed the Williamite invasion, and there is no reason to believe that he paid any heed to Ailesbury’s order to provide four horses for the county militia in November.
Bolingbroke took his seat in the Convention on 25 Jan. 1689 after which he sat for approximately 61 per cent of all sitting days in the session. Unlike his brother Bolingbroke proved to be no more active in the Lords than he had been in the Commons, and although he was named to 16 committees during the first session, he does not appear to have played any particular role within them. On 31 Jan. he voted in favour of declaring William and Mary king and queen and the same day entered his dissent at the resolution not to concur with the Commons that the throne was ‘vacant’. Bolingbroke again sided with the Commons on 4 Feb., voting in favour of the use of the word ‘abdicated’ and entered his dissent when the Commons’ resolution was overturned. Two days later he supported the Commons again on the same matter. Bolingbroke was excused attendance on account of poor health on 4 March. He resumed his seat on 18 Mar. and took the oaths. Named one of the reporters of the conference for the dissenters’ toleration bill on 22 May, on 31 May he voted in favour of reversing the perjury judgments against Titus Oates and subscribed the protest when the House resolved not to do so. Bolingbroke was entrusted with additional local responsibility when he was appointed custos rotulorum of Bedfordshire in July 1689. On 30 July he voted against adhering to the Lords’ amendments to the reversal of the judgments against Oates and subscribed the protest when the resolution to do so was carried. Bolingbroke resumed his seat for the second session of the Convention on 11 Nov. 1689, but he was then present for a mere 22 per cent of the session. In a list compiled between October 1689 and February 1690 Thomas Osborne, marquess of Carmarthen, regarded him as an opponent of the court.
The general election saw the two county seats in Bedfordshire shared between the Russell and St John interest, while Christie and Hillersden were again returned for the borough.
Mentioned in a letter of 4 Sept. as having been unwell, St John sat for just one day of the second (1690-1) session. He arrived for the 1691-2 session on 23 Nov. 1691, when he again sat for just one day before vacating his seat for almost two months.
Absent at the opening of the 1693-4 session, Bolingbroke took his seat on 21 Nov.; he was again present for just 24 per cent of the entire session. On 22 Feb. 1694 Bolingbroke may have been one of those to contribute to the debate on the trials for treason bill, but otherwise he appears to have made little impression on the House for the following two years and he failed to sit at all for the entirety of 1695.
Bolingbroke resumed his seat in the House on 11 Feb. 1696 but once more sat for little more than two months before retiring for the remainder of the session. He returned to the House on 30 Nov. 1696, and on 23 Dec. he voted in favour of the attainder of Sir John Fenwick‡. Thereafter, a further lengthy absence ensued with Bolingbroke failing to attend for almost seven years. He registered his proxy in favour of Stamford on 12 Mar. 1697 and again on 30 June 1698 but thereafter was unable to do so as he did not attend to take the oaths in the new Parliament. Poor health and financial problems were probably the reasons for his seclusion. In 1698 Bolingbroke was involved in a case in chancery brought by the heirs of Sir Rowland Alston, who had named Bolingbroke as one of his executors. Although Bolingbroke refused to act, he continued to be troubled by business concerning the case for a number of years.
Excused at a call of the House on 5 Jan. 1702, the following year Bolingbroke was listed consistently among those thought to be opposed to the occasional conformity bill. He returned to the House on 8 Dec. 1703, and on 14 Dec. he behaved as expected by voting to throw out the bill. Bolingbroke sat for the final time on 14 Feb. 1704. On 8 Dec. he registered his proxy in favour of Charles Spencer* , 3rd earl of Sunderland, but thereafter he played no further part in the House’s business.
Bolingbroke’s remaining years were marked by ill health and a worsening financial situation.
