After the
disaster of 1906 Balfour remained party leader, his position strengthened by Joseph Chamberlain's removal from active politics after his stroke in July 1906, but he was unable to make much headway against the huge Liberal majority in the House of Commons. An early attempt to score a debating triumph over the government, made in Balfour's usual abstruse, theoretical style, saw Campbell-Bannerman respond with: "Enough of this foolery," to the delight of his supporters in the House. Balfour made the controversial decision, with
Lord Lansdowne, to use the heavily Unionist
House of Lords as an active check on the political program and legislation of the Liberal party in the
House of Commons. Numerous pieces of legislation were vetoed or altered by amendments between 1906 and 1909, leading
David Lloyd George to remark that the Lords had become "not the watchdog of the Constitution, but Mr. Balfour's poodle." The issue was eventually forced by the
Liberals with Lloyd George's so-called
People's Budget, provoking the constitutional crisis that eventually led to the
Parliament Act of 1911, which replaced the Lords' veto authority with a greatly reduced power to only delay bills for up to two years. After the Unionists had failed to win an electoral mandate at either of the General Elections of 1910 (despite softening the Tariff Reform policy with Balfour's promise of a referendum on food taxes), the Unionist peers split to allow the Parliament Act to pass the House of Lords, in order to prevent a mass-creation of new Liberal peers by the new King, George V. The exhausted Balfour resigned as party leader after the crisis, and was succeeded in late 1911 by
Andrew Bonar Law.
Balfour remained an important figure within the party, however, and when the Unionists joined
Asquith's coalition government in May 1915, Balfour succeeded
Winston Churchill as
First Lord of the Admiralty. When Asquith's government collapsed in December 1916, Balfour, who seemed for a time a potential successor to the premiership, became
Foreign Secretary in Lloyd George's new administration, but was not actually included in the small War Cabinet, and was frequently left out of the inner workings of the government. Balfour's service as Foreign Secretary was most notable for the issuance of the
Balfour Declaration of 1917, a letter to Lord Rothschild promising the Jews a "national home" in
Palestine, then part of the
Ottoman Empire.
Balfour resigned as Foreign Secretary following the
Versailles Conference in 1919, but continued on in the government (and the Cabinet after normal peacetime political arrangements resumed) as
Lord President of the Council. In 1921-22 he represented the British Empire at the
Washington Naval Conference.
In 1922 he, along with most of the Conservative leadership, resigned with Lloyd George's government following the Conservative back-bench revolt against the continuance of the coalition. Bonar Law soon became Prime Minister. In 1922 Balfour was created
Earl of Balfour. Like many of the Coalition leaders he did not hold office in the Conservative governments of 1922-4, although as an elder statesman he was consulted by the King in the choice of Baldwin as Bonar Law's successor as Conservative leader in May 1923. When asked by a lady whether "dear George" (the much more experienced
Lord Curzon) would be chosen he replied, referring to Curzon's wealthy wife Grace, "No, dear George will not but he will still have the means of Grace."
Balfour was again not initially included in
Stanley Baldwin's second government in 1924, but in 1925 he once again returned to the Cabinet, serving in place of the late Lord Curzon as
Lord President of the Council until the government ended in 1929.
Apart from a number of colds and occasional
influenza, Balfour had enjoyed good health until the year 1928. He remained until then a regular tennis player. At the end of that year most of his teeth had to be removed and he began to suffer from the unremitting circulatory trouble which ended his life. Late in January 1929 Balfour was conveyed from Whittingehame to Fisher's Hill, his brother Gerald's home near
Woking, Surrey. In the past he had suffered from occasional bouts of
phlebitis and by the autumn of 1929 he was immobilized by it. Finally, soon after receiving a visit from his friend
Chaim Weizmann, Balfour died at Fisher's Hill on 19 March 1930. At his own request a public funeral was declined and he was buried on 22 March beside members of his family at
Whittingehame. Despite the snowy weather, attenders came from far and wide. By special remainder, the title passed to his brother Gerald.
Lord Balfour's estate was probated £76,433 5
s. 2
d. on
August 27, 1930.