Bordering states key in battle over Indiana

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Hillary Rodham Clinton's Indiana strategy relies on the state's similarities with eastern neighbor Ohio, where fertile farmland and factory towns produced blue-collar workers who propelled her to victory there.
To the west is Barack Obama's home state, Illinois, where he has long been a familiar face in the Chicago TV market that serves northern Indiana and trounced Clinton in the state's Feb. 5 primary. The Illinois senator often jokes about "making a break" for home while campaigning in the Hoosier state.
The result: Neither candidate has a clear advantage as they seek the 72 pledged delegates at stake in Indiana's primary on May 6. Polls are split, making Indiana perhaps the biggest question mark left on the primary calendar.