At a by-election in 1731 Somerset was returned for Monmouthshire, which his family traditionally represented, but at the next general election he transferred to Monmouth, where his brother had a strong interest. ‘A most determined and unwavering Jacobite’,
After Lord Gower, hitherto the head of the Tory party, joined the Broad-bottom Government in December 1744, Somerset, now Duke of Beaufort, in Newcastle’s words,
set himself up, and the Tories have taken him, for the head of their party. In consequence of which, they have excluded Lord Gower from a negotiation depending about justices of peace [for the inclusion of Tories into the commissions], [and] put it into the hands of the Duke of Beaufort.
To Chesterfield, 26 Mar. 1745, Add. 32804, ff. 286-7.
Beaufort, meeting Lord Hardwicke, stated that ‘the lords and gentlemen with whom he had met or consulted, were uneasy that nothing was done in the affair of justices of the peace’ and asked that new commissions should be issued for six specific counties ‘as an earnest of what should be done in other counties’. But the Pelhams excluded him from the negotiations on the matter, which they conducted with Lord Gower.
On the eve of the dissolution of 1747, Beaufort was one of the prominent Tories who agreed to support the Prince’s programme.
The Duke of Beaufort opened the assembly with a panegyric on the stand that had been made this winter against so corrupt an administration; and hoped it would continue, and desired harmony.
To Mann, 3 May 1749.
In September 1750 he and Lord Westmorland (John Fane) jointly presided at a meeting of English Jacobites held during the Young Pretender’s secret visit to London in September 1750.
