Mitt Romney said Tuesday that the problems inflicted by President Obama’s policies are even worse than he predicted during the 2012 presidential campaign. “It’s been a good deal worse than even I expected,” Mr. Romney told reporters after headlining a rally here for Republican candidates for the U.S. Senate and House of Representatives. “I was not a big fan of the president’s policies, as you know, either domestically or internationally,” he said. “But the results of his mistakes and errors, in my opinion, have been more severe than even I would have predicted.”