Complex sentence: Huhne had twice stood unsuccessfully for election as Leader of the Liberal Democrats; in 2006 he came second to Sir Menzies Campbell and in 2007 he narrowly lost to Nick Clegg.
Split into simpler sentences: Huhne had twice stood unsuccessfully for election as leader of the Liberal Democrats. In the 2006 election he came second to Sir Menzies Campbell and in the 2007 election he narrowly lost to Nick Clegg.