Complex sentence: The ailing economy which arose from recession may have been the main factor in Bush's loss, as 7 in 10 voters said on election day that the economy was either "not so good" or "poor".
Split into simpler sentences: The ailing economy that arose from recession may have been the main factor in Bush's loss. On electon day, 7 in 10 voters said that the economy was either "not so good" or "poor".