with the Soviet Union." Historian Keith W. Olson has written that Nixon left a legacy of fundamental mistrust of government, rooted in Vietnam and Watergate. In surveys of historians and political scientists, Nixon is generally ranked as a below-average president. During the impeachment of Bill Clinton in 1998, both sides tried to use Nixon and Watergate to their advantage: Republicans suggested that Clinton's misconduct was comparable to Nixon's, while Democrats contended that Nixon's actions had been far more serious than Clinton's. Another legacy, for a time, was a decrease in the power of the presidency as Congress passed restrictive legislation in the wake of Watergate. Olson suggests that legislation in the aftermath of the September 11 attacks restored the president's power. Personality and public image Nixon's career was frequently dogged by his persona and the public's perception of it. Editorial cartoonists and comedians often exaggerated his appearance and mannerisms, to the point where the line between the human and the caricature became increasingly blurred. He was often portrayed with unshaven jowls, slumped shoulders, and a furrowed, sweaty brow. Nixon had a complex personality, both very secretive and awkward, yet strikingly reflective about himself. He was inclined to distance himself from people and was formal in all aspects, wearing a coat and tie even when home alone. Nixon biographer Conrad Black described him as being "driven" though also "uneasy with himself in some ways". According to Black, Nixon thought that he was doomed to be traduced, double-crossed, unjustly harassed, misunderstood, underappreciated, and subjected to the trials of Job, but that by the application of his mighty will, tenacity, and diligence, he would ultimately prevail. Nixon sometimes drank alcohol to excess, especially during 1970. He also was prescribed sleeping pills. According to Ray Price, Nixon sometimes took them in together. Nixon also took dilantin, recommended by Jack Dreyfus. That medicine is usually prescribed to treat and prevent seizures, but in Nixon's case it was for depression. His periodic overindulgences, especially during stressful times such as during Apollo 13, concerned Price and others, including then-advisor Ehrlichman and long-time valet Manolo Sanchez. Author and former British politician David Owen deemed Nixon an alcoholic. Biographer Elizabeth Drew summarized Nixon as a "smart, talented man, but most peculiar and haunted of presidents". In his account of the Nixon presidency, author Richard Reeves described Nixon as "a strange man of uncomfortable shyness, who functioned best alone with