Top five spenders on ads,
Weekly spending on television ads by candidates
Margin of victory in past presidential elections
President Obama has spent more than triple what Mitt Romney has on television ads here. But Mr. Romney has ramped up his spending in the last month.
Mr. Obama won the state in 2008, but both men face challenges here and must win over the white working class, a group that makes up more than half the electorate.
The state voted Democratic in the past five presidential elections, but Republicans hope Mr. Romney’s economic message wins over independent voters.
