Irish Volunteer
Between 1775 and 1783, Robert Stewart lived in Bangor with his wife, while his father was living at Mount Stewart.
In 1776, a general election was held in Ireland. Robert Stewart stood again for Down and was re-elected. He sat until the dissolution of this parliament on 25 July 1783.
Stewart participated in the Irish Volunteers, the self-armed militia ostensibly formed to maintain order and defend Ireland while the Crown and its forces were distracted by the American War. Following the raid on Belfast Lough by the American privateer John Paul Jones in April 1778, Stewart organised a volunteer company in Newtownards of 115 men, the Arms Independents, to act as fencibles. Like other Volunteer companies, they were soon engaged in patriotic debate.
After his father died in April 1781, moved to the family seat, Mount Stewart, near Newtownards (where in the park he completed the Temple of the Winds). On 17 September 1782 he was sworn in as Irish Privy Councillor.
That very same month as Colonel Stewart he was elected president of the second Ulster (overwhelmingly Presbyterian) Volunteer Convention in Dungannon.
Anticipating a "grand national convention" called for Dublin in November, it notably failed to broaden the front against the Ascendancy. Resolutions in support of Catholic enfranchisement were rejected.
In the general election of October Stewart stood again for County Down but the Ascendancy families triumphed, one seat taken by Arthur Hill, the son of the Earl of Downshire, the other by Lord Bangor's son, Edward Ward. Stewart unsuccessfully challenged the returns at the bar of the House of Commons claiming irregularities. Downshire's influence was able to procure the dismissal of his petition with costs".
At the Dublin convention, Stewart was appointed chairman of the committee "for the receiving and digesting plans of reform". But the convention tactic did not succeed as in 1782, when the massed ranks of the Volunteers had helped secure Irish legislative independence. The digested bill, presented by Henry Flood, which would have abolished the proprietary boroughs (with which their Ascendancy rivals, but not the Stewarts, were endowed) and extended the vote to a broader class of Protestant freeholders was rejected. Having accepted defeat in America, Britain could again spare troops for Ireland, and neither parliament nor Dublin Castle would again be intimidated.
Although he believed that the demands of Dissenters for greater representation should have been met so as to dissuade them from pushing Catholic claims along with their own, Stewart joined his friend, president of the convention, the Earl of Charlemont in urging the Volunteers to receive their rebuff quietly.