Amid growing concerns about the economy, Ohio Democrats are coming home to Sen. Barack Obama, giving him a 7-point advantage in a new Dispatch Poll as the volatile presidential campaign swings into its final month. The Illinois senator's lead of 49 percent to 42 percent over Republican Sen. John McCain comes at an especially opportune time for Obama because thousands of Ohioans already are casting ballots in the state's first presidential election allowing any registered voter to vote absentee. The new setup takes away some of the heft from the adage "the only poll that counts is the one on...