They began on the topic of foreign policy, recounting the leaders he had known, but the most remembered section of the interviews was that on Watergate. Nixon admitted he had "let down the country" and that "I brought myself down. I gave them a sword and they stuck it in. And they twisted it with relish. And, I guess, if I'd been in their position, I'd have done the same thing." The interviews garnered 45–50 million viewers—becoming the most-watched program of its kind in television history. The interviews helped improve Nixon's financial position—at one point in early 1975 he had only $500 in the bank—as did the sale of his Key Biscayne property to a trust set up by wealthy friends of Nixon, such as Bebe Rebozo. In February 1976, Nixon visited China at the personal invitation of Mao. Nixon had wanted to return to China but chose to wait until after Ford's own visit in 1975. Nixon remained neutral in the close 1976 primary battle between Ford and Reagan. Ford won, but was defeated by Georgia Governor Jimmy Carter in the general election. The Carter administration had little use for Nixon and blocked his planned trip to Australia, causing the government of Prime Minister Malcolm Fraser to withhold its official invitation. In 1976, Nixon was disbarred by the New York State Bar Association for obstruction of justice in the Watergate affair. He chose not to present any defense. In early 1978, he visited the United Kingdom; there, he was shunned by American diplomats, most ministers of the James Callaghan government, and two former prime ministers, Harold Macmillan and Edward Heath. He was welcomed, however, by the Leader of the Opposition, Margaret Thatcher, as well as by former prime ministers Lord Home and Sir Harold Wilson. Nixon addressed the Oxford Union regarding Watergate: Author and elder statesman In 1978, Nixon published his memoirs, RN: The Memoirs of Richard Nixon, the first of ten books he was to author in his retirement. The book was a bestseller and attracted a generally positive critical response. Nixon visited the White House in 1979, invited by Carter for the state dinner for Chinese Vice Premier Deng Xiaoping. Carter had not wanted to invite Nixon, but Deng had said he would visit Nixon in California if the former president was not invited. Nixon had a private meeting with Deng and visited Beijing again in mid-1979.