A country gentleman with Tory leanings, Vaughan was returned unopposed for Merioneth in 1754 and was classed by Dupplin as ‘doubtful’. In 1761 Newcastle did not summon Vaughan at the opening of the session; but in Bute’s list he was marked ‘Government’. He is not in Fox’s list of Members in favour of the peace preliminaries. He supported the Grenville Administration; and on 16 Feb. 1764, during the campaign over general warrants, Edward Kynaston, who had heard that Vaughan was ‘to go into the country next week’, wrote to Jenkinson to ask whether it would not be proper ‘to keep him in town a little longer’.
He retired at the general election of 1768 and died 12 Apr. 1775.
