Laurie’s patron was the Duke of Queensberry, a family friend, who in 1774 brought him into Parliament for Dumfriesshire as a Government supporter. A silent and ineffective Member, Laurie’s frequent absences may be attributed in part to military duty, although throughout the American war he never served abroad. Listed ‘pro, absent’ on the contractors bill, 12 Feb. 1779, he was also absent on 3 Mar. from the division on Keppel, whereupon Amherst, on the King’s instructions, wrote to him requesting his attendance for the Admiralty censure debate on 8 Mar.
After Queensberry’s death in 1778 he retained the favour of the new Duke, succeeded his father as surveyor general of the window tax, and obtained a lieutenant colonelcy, but was still irregular in attendance in the House. Whenever he did vote it was with Government. He was particularly requested by Jenkinson on 21 Nov. 1781
Sir Robert Laurie will probably come in again. His conduct will in a good measure, though perhaps not entirely, depend on the Duke of Queensberry. His inclination is to be with Government. He may from the Duke be at present against [Pitt], but on any change or future Parliament it is apprehended would be both pro.
By January 1784 he had been won over to Pitt. At the general election he was returned as a Government supporter with the backing of Queensberry, who in 1785 ‘strongly seconded’ his successful application for the place of knight marischal.
He died 10 Sept. 1804.
