"There is a reason some states are called general election 'battlegrounds.' It is because partisan identification is roughly even, or because certain groups in the electorate, such as Catholics, Hispanics or blue-collar whites, switch their allegiances -- or split their votes. That's why Clinton made so much in her victory speech about the 'bellwether' nature of Ohio: 'It's a battleground state. It's a state that knows how to pick a president. And no candidate in recent history, Democrat or Republican, has won the White House without winning the Ohio primary,' she said.
"There is no papering over the depth of the problem Obama faced there. He won only five of the state's 88 counties, an inauspicious foundation for a general election campaign. Clinton trounced him among Catholic voters, 63 percent-36 percent, according to exit polls. She beat him among voters in every income category and bested him by 14 points among those making less than $50,000 annually..."

