Perspective

Dizzy Thinks wonders at the current furore over David Cameron, Andy Coulson and phone-hacking:

 'Prime Minister: Tony Blair
Allegation: Accused of modifying government policy relating to tobacco advertising in sports in return for a donation of £1 million to his political party
Truth Status: Not proven - opinions on truth dependent on personal prejudices. Donation eventually returned (although modified policy remained in force)
What Opponents Said: Resign
Political Status: Survived and won following two elections.

Prime Minister: Tony Blair
Allegation: Along with his Director of Commmunication accused of lying to Parliament by embelishing and "sexing up" the case for the Iraq War. Presure intensified by the sudden, mysterious death of whistleblower leading to multiple inquiries and conspiracy theories.
Truth Status: Not proven - opinions on truth dependent on personal prejudices.
What Opponents Said: Resign
Political Status: Survived and won following election.

Prime Minister: Tony Blair
Allegation: That peerages and knighthoods were offered and exchanged for loans and donations to the Labour Party. Staff in Downing Street including the Prime Minister questioned by Police.
Truth Status: Not proven - opinions on truth dependent on personal prejudices.
What Opponents Said: Resign
Political Status: Survived

Prime Minister: David Cameron
Allegation: That he previously employed someone who has since resigned, who may have - as yet to be proven but alleged by a whistle-blower who has suddenly died - acted criminally prior to his employment; and to have met with multiple times on both personal and business terms (in keeping with his two predecessors), the Chief Executive of a newspaper business.
Truth Status: What exactly is the allegation? Opinion will depend on personal prejudices.
What Opponents Said: Resign
Political Status: To Be Confirmed (oddly)'

Dizzy Thinks has a very good point. I think there may be other examples involving Gordon Brown...