The Democratic Party’s problem is that voters don’t believe the president’s claims that the economy is thriving. Even people with jobs feel apprehensive. Paychecks are flat, growth anemic, and people are worried about their children’s prospects. Mr. Obama had a 38% approval on handling the economy in the Sept. 9 Fox News poll. In the Sept. 7 NBC News/Wall Street Journal poll, 67% believe America is on the wrong track.