President George W Bush campaigned up and down a small rural stretch of the heartland yesterday, desperately seeking to shore up his position in a once safe region where Republicans are registering the first prickles of concern about his record - and his chances. With just a week to go before voting, Mr Bush focused his fire on Wisconsin and Iowa, two mid-western states that have become pivotal to his chances. He lost both narrowly to Al Gore in 2000 but now badly needs to win them as an insurance policy, given the state of play in Ohio and Florida,...