Mitt Romney's campaign is shifting its strategy to focus on the future, adviser Ed Gillepsie told reporters Monday. 

The Hill reports

"We are talking not only on the president's performance over the past four years but the cost of his policies going forward," said Romney adviser Ed Gillespie during a conference call with reporters, repeatedly emphasizing that the campaign would argue "how four more years of the last four years is not going to be good for the American people."

Part of the new strategy will be a continued focus on China. A Romney ad released Monday morning argued that "we can't afford four more" years of Obama's China policy. 

The shift comes amid polls finding that a message focused on Obama's first term is not enough to pull Romney into the lead. Even when voters think they are not better off than they were four years ago, Obama has the edge in key swing states. 

On "Fox News Sunday", the Weekly Standard's Bill Kristol argued that the Obama team had done "pretty well" with the economy in the past four years. To win, he said, Romney has "got to make it a referendum on the choice about the next four years."

A week ago, Romney's camp announced a renewed focus on policy details -- although he has not added more specifics to his existing proposals.