Lord Rockingham, with the support of Pitt and the King, repealed Grenville's unpopular Stamp Act, but his government was weak and he was replaced in 1766 by Pitt, whom George created Earl of Chatham. The actions of Lord Chatham and George III in repealing the Act were so popular in America that statues of them both were erected in New York City. Lord Chatham fell ill in 1767, and Augustus FitzRoy, 3rd Duke of Grafton, took over the government, although he did not formally become Prime Minister until 1768. That year, John Wilkes returned to England, stood as a candidate in the general election, and came top of the poll in the Middlesex constituency. Wilkes was again expelled from Parliament. He was re-elected and expelled twice more, before the House of Commons resolved that his candidature was invalid and declared the runner-up as the victor. Grafton's government disintegrated in 1770, allowing the Tories led by Lord North to return to power.