As a young barrister, Adair was in violent opposition to the Court and, as Lord Lowther’s Member for Cockermouth, a scathing critic of Lord North’s administration. Left without a seat in 1780 and defeated at Southwark in 1782, he fell back on his profession. He joined the Whig Club, 26 June 1784. Apart from his politics, the effect on his health of his other professional duties as King’s serjeant nudged him out of the recordership of London worth £1,000 p.a. In June 1789 he retained his place as counsel to the Ordnance, which he considered ‘distinct from party’.
On 8 Feb. 1790 the Duke of Portland in a letter of introduction for the Prince of Wales described Adair as ‘a steady friend to the party’, who had acted for them in the Regency crisis. He remained active in the Southwark branch of the Whig Club.
On 3 Aug. 1793 Adair was offered by Earl Fitzwilliam an expected vacancy at Higham Ferrers, which, being a close borough, could not cost him more than £150 at elections. Accepting the offer, 8 Aug., he assured his patron that they were ‘likely very seldom to differ’:
I cannot prevail upon myself to concur in any systematic opposition to government, on the subject of the war with France, unless the ministry should hereafter neglect any fair and palpable opportunity of terminating it, by a safe and honourable peace in a manner consistent with the faith of treaties.
In reply, Fitzwilliam assured him that there was ‘but a shade’ of difference between them.
As Fox had noted hopefully, Adair also disliked the proceedings against the Scottish radicals, and on 4 Feb. 1794, in his first known speech in the House, supported Adam’s motion in favour of appeals to the Lords against the judgments of the Scottish courts. Although he absented himself on 10 Mar., when Adam developed his theme, on the pretext of ignorance of Scottish criminal law, he supported Adam’s motion for a select committee on the subject, Mar. On 10 Feb. he had successfully moved the previous question 25 against Grey’s motion objecting on constitutional grounds to the landing of foreign troops in England; he admitted, nevertheless, that a violation of the letter of the law was involved and that he must in extremis support Grey’s requirement of indemnity. On 14 Mar., after showing that there was no prerogative in the crown to introduce foreign troops, he accordingly did so by speech and vote. Another question upon which he differed from Pitt was that of voluntary subscriptions for home defence not explicitly countenanced by Parliament, 17 Mar., 1 Apr. Pitt refused Adair’s offer of a clause tagged on to the volunteer bill to remove the anomaly; nor did Portland share Adair’s enthusiasm for it. When he brought in his clause, 7 Apr., it was supported only by Foxite Whigs and negatived without a division.
A memorandum, in Adair’s hand, of ‘Grounds on which independent Members of Parliament ought at this time to act, May 1794’ emphasized the need to support government in a ‘vigorous prosecution of the present just and necessary war’ and in preserving public order and the principles of 1688 against those who sought to ‘overturn the constitution ... by giving any new power to the body of the people, or asserting any rights in them, inconsistent with the just prerogative of the crown and the rights and privileges of the nobles’. Independent Members were nevertheless to act as a check on the executive, lest it take advantage of its extraordinary powers in time of emergency to abuse the liberties of the subject.
Adair, who was of Irish background and had inherited estates in county Down, was thought of for Irish office—as lord chancellor—when Portland joined administration in July 1794. He was assured of Irish Whig support if the new viceroy proscribed the ‘Castle gang’. Writing to the duke on 3 Aug. he referred to the role he might be called upon to play in the implementation of Irish policy if Fitzwilliam became viceroy.
His patron’s recall from Dublin placed Adair in a painful dilemma, in so far as Portland must be supposed to have acquiesced in it. A quarrel between the two men must be as harmful to the ‘true Whig interest’, as the recall in itself was to Ireland and to Anglo-Irish relations. On 8 Mar. Adair was told his side of the story by Portland. When next day Fitzwilliam, in his isolation, appealed to him for his friendship, he was moved to remind Portland that he had been opposed to Fitzwilliam’s recall, but admitted that it would be ‘the least of two afflictions’ if he remained Portland’s friend. To Fitzwilliam he wrote consolingly, indicating that he could not adjudicate without further information. He avoided a full explanation with Fitzwilliam and on 19 May, when the House disposed of the question of the viceroy’s recall, moved the order of the day against the motion for inquiry, on the basis of cui bono. He had represented the preliminary debate to Fitzwilliam as ‘the most complete triumph’ for him and such as made any further discussion undesirable.
Adair retained Fitzwilliam’s confidence, being offered, 12 Sept. 1795, a fresh lease of Higham Ferrers by his patron, who did not think they differed ‘materially’. Fitzwilliam was now politically unconnected, not wishing to give ‘ostensible strength’ to ministers, but unwilling to join opposition because of his general support for the war and hostility to jacobinism. Accepting the offer from Belfast, 26 Sept., Adair was anxious to assure his patron that they were in substantial agreement. He could not pledge himself to support the conduct of the war by ministers, though he approved the justice of it and would prefer peace, but doubted if it was at present feasible. He had no confidence in Pitt, but saw no alternative. He proposed, therefore ‘a general support’ to administration, ‘though I shall probably feel it a duty to oppose them in some instances; and shall be happy on every occasion, to manifest my disapprobation of their conduct to your lordship, in relation to the government in Ireland’.
Adair’s election at Higham Ferrers in 1796 cost him a mere £193, and when he was offered the chief justiceship of Chester in November his patron assured him that his re-election would be no problem, adding that he was glad that the appointment was on professional merit and not ‘an ostensible ministerial’ one.
Adair attended Pitt’s conference on the assessed taxes bill, 17 Dec. 1797, and assisted in its passage. He opposed Sheridan’s amendment to the newspaper bill, 13 June 1798, which permitted the reproduction of French press attacks on the English government. He was reported to have opposed the Whig censures on the Irish government, 22 June, but according to Charles Grey, he was critical of its conduct. He died on 21 July 1798, of a paralytic stroke, said to have been brought on by his exertions as a light horse volunteer since 19 June. Like his parents, he was buried at Bunhill Fields.
