Vote Saxon

Vote Saxon was the ultimately successful campaign made by "Harold Saxon", actually, to become Prime Minister of the United Kingdom in an election held in 2008.

History
Appearing on Earth just after the downfall of British Prime Minister Harriet Jones, which was brought about the Tenth Doctor on 25 December 2006, (TV: The Sound of Drums, The Christmas Invasion) quickly infiltrated the British government by fabricating the identity of Harold Saxon. At the same time, the Archangel Network of fifteen satellites was launched by the Master, already a minister. Ostensibly a mobile phone network, Archangel was used by the Master to influence the human population of Earth, first to believe the story of "Harold Saxon", then to "Vote Saxon", as well as preventing the Doctor from sensing him as another Time Lord on Earth. However, the Master later conceded that only "99" or "98" percent of people were successfully influenced. (TV: The Sound of Drums, The Christmas Invasion)

After March 2007, Saxon was reported by The Daily Telegraph newspaper as leading polls with 64% during a state of "government paralysis". (TV: Love & Monsters) In light of the downfall of Harriet Jones, an election was called to decide the next Prime Minister. Harold Saxon put forward his bid for Prime Minister, beginning the "Vote Saxon" campaign, with posters appearing from London to Cardiff (TV: Smith and Jones, Captain Jack Harkness) while websites were established to cover Harold Saxon. Among the people who backed Saxon were Ann Widdecombe, Sharon Osbourne and the band McFly. (TV: The Sound of Drums)

Among those who were influenced by Archangel was Martha Jones, who had intended to vote for Saxon despite being ignorant of his policies and what he stood for. (TV: The Sound of Drums)

On election day, (TV: 42) as the vote "[swang]" Saxon's way, future members of his cabinet, as the Master put it, abandoned their political parties and jumped on "the Saxon bandwagon". (TV: The Sound of Drums)

Ultimately, the Master won the election as "Harold Saxon", which led to the Toclafane invasion. (TV: The Sound of Drums)

Behind the scenes
"Leaders of all three major parties - and even some Scottish Nationalists - defected to his banner of unity, bringing most of their parties with them. All that remains of those once august institutions are a few old soldiers, unable to change with the times and clinging to past glories. The rest of us look forward to a more effective and efficient government."
 * "Vote Saxon" imagery was used in the promotion of Series 3 of Doctor Who, broadcast on BBC One.
 * The exact nature of "Harold Saxon's" political party are not elaborated on, with only the reference that his cabinet "abandoned [their] parties and [they] jumped on the Saxon bandwagon".
 * The in-universe website haroldsaxon.co.uk contains more details:

- haroldsaxon.co.uk