It declined from its heyday, when led by such figures as William Pitt the Younger, to a small surviving faction headed by Benjamin Disraeli that became its spiritual successor, the modern Conservative Party.
This group emerged during disputes with the self-styled "True Protestants", in turn referring to themselves as the Abhorrers.  Initial success in that conflict was exemplified by the crushing of the Monmouth Rebellion.  The prosecution of preacher Henry Sacheverell and the namesake disturbances led to another of this group's successes, the creation of the Riot Act, thirty years after their defeat of the Exclusion Act. Cromwell's conquests during the Wars of the Three Kingdoms led to the phenomenon that named this party, by causing an increase in landless, armed Irish-Catholics. It declined from its heyday, when led by such figures as William Pitt the Younger, to a small surviving faction headed by Benjamin Disraeli that became its spiritual successor, the modern Conservative Party. Rising to prominence due to their defense of royal power during the English Restoration, this is, for 10 points, what British political party, which was opposed by the Whigs?
This group emerged during disputes with the self-styled "True Protestants", in turn referring to themselves as the Abhorrers.  
{Tory} Party