Neil Newhouse, Mitt Romney’s pollster and senior strategist, has penned a memorandum released to reporters designed to rebut the conventional wisdom that the candidate has fallen behind in the presidential race and calm any panic among Republican supporters.

“Don’t get too worked up about the latest polling,” Newhouse writes. “While some voters will feel a bit of a sugar-high from the conventions, the basic structure of the race has not changed significantly. The reality of the Obama economy will reassert itself as the ultimate downfall of the Obama Presidency, and Mitt Romney will win this race.”

This comes as several new national polls show that after months of a deadlock, Obama opened a lead over Romney following last week’s DNC in Charlotte. In a Reuters/Ipsos poll released on Sunday, 47 percent of likely voters supported Obama and 43 percent Romney. In the Gallup tracking poll, Obama leads Romney 49 percent to 44 percent, while an automated Rasmussen poll released Monday put Obama at 50 percent and Romney at 45 percent.