With Americans facing gasoline prices of a gallon, record home foreclosures and fears about unemployment, presidential candidates John McCain and Barack Obama are increasing their focus on economic policy in their campaigns for the presidency. For the most part, the positions of the presumptive nominees, Republican McCain and Democrat Obama, fall along traditional party lines: Obama leans more toward government involvement in the economy, while McCain’s proposals rely on private sector solutions. Both plans, however, would certainly add to already troubling deficits, according to Wharton faculty and economic policy analysts who point to worrisome elements of both candidates’ plans. “It’s early in the election cycle. Both candidates have an opportunity to refine — and rethink — their economic policies,” says Wharton finance professor Richard Marston . “Both had better do more rethinking before one of them becomes president.” Voters are growing increasingly concerned about the nation’s financial situation.…