Former Rep. J.D. Hayworth’s all-but-official primary challenge to Sen. John McCain (R-Ariz.) has already started to reignite long-simmering tensions within the state’s Republican faithful. Those divisions — combined with both men’s reputation for bare-knuckle politics, a volatile electorate and a state in financial crisis — equal a recipe for one of the country’s fiercest political contests of 2010. (snip) Hayworth’s advisers say they are prepared to go head to head with McCain on spending issues. Hayworth spokesman Jason Rose said there is “hypocrisy” in McCain touting a conservative record on spending when he supported bailing out the banking and mortgage...