Nothing prompts a change of course faster than anticipated failure.  This rule is maximized in the realm of political office seeking.

Recently in this column points of common interest were revealed concerning Richard Nixon in the seventies and George W. Bush currently.  Nixon concluded a Vietnam peace with virtually the same terms Lyndon Johnson was offered during the 1968 election campaign.  We now know from Anthony Summers and other sources that Nixon and foreign policy adviser sabotaged through dealing with the South Vietnamese government.

No sooner was the Vietnam albatross removed than the Watergate scandal occupied a vise-like grip from which Nixon could never extricate himself.  The politician known as "Tricky Dick" had, in his anxiety to make his last election for the presidency in 1972 his biggest triumph, secured a landslide victory but became ultimately undone through his own excesses in seeking to secure that result.

It is notable that when Nixon resigned his popularity rating stood in the abysmally low 30's.  George W. Bush is mired today at that same woeful figure.  It is a critical point  considering that, just as the hardcore right wing Republicans were the only supporters left in 1974 when Nixon resigned, the same holds true today for Bush.