KING OF PRUSSIA, Pa. — If Mitt Romney were to make a last-minute move to expand his electoral map, Ground Zero for that effort likely would be here amid the suburban sprawl of Montgomery County, outside of Philadelphia.

But as about 20 Obama campaign volunteers gathered Thursday night for another evening of phone-banking, there was little concern among the Democratic partisans inside Dave Hopkins’ actuarial office just off of the Pennsylvania Turnpike.

Confidence about the president carrying Pennsylvania has always been high here, as he has not trailed in a single state poll since February and leads Romney by 4.8 percentage points in the latest RCP Average.

But there is added reason for Obama’s Keystone State legions to feel optimistic with just a week and a half to go until Election Day: The Romney camp has not aired a single TV ad in Pennsylvania, and the former Massachusetts governor has not set foot here in a month.

“If he thought he could win, Romney would be doing something really strong here, and he’s not,” said Cindy Bellamy, the local neighborhood team leader for the Obama campaign. “And that’s because he doesn’t have any hope.”

Romney’s running mate, Paul Ryan, did hold a rally in the Pittsburgh suburb of Moon Township last Saturday, and Republican National Committee Chairman Reince Priebus on Friday headlined a campaign bus tour through western Pennsylvania with former Gov. Tom Ridge, Pittsburgh Steelers great Lynn Swann, and other Republican surrogates.

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