ABCNews -- A year after he went one-on-one with John McCain, Barack Obama's now playing for time. For all that's transpired since his election as president, public opinion has not moved on the big issue, the current economy. The question a year later is how long Obama's got until it goes up, or he goes down possibly with his party in tow. Click here for analysis with charts and tables. The danger was evident in Tuesday's off-year voting, in which the incumbent Democratic Party lost the New Jersey and Virginia governorships, with 89 and 85 percent of voters, respectively, worried about the economy in the year ahead. Majorities were "very" worried and they voted Republican by wide margins, 61-34 percent in New Jersey, 77-23 percent in Virginia....