A thumb-sized Romney walks onto the home page of the presidential candidate's Web site, pointing out helpful features before exiting, stage left.

"I hope you'll also consider making a contribution to my campaign," Mini-Mitt says while gesticulating with his arms and hands at the lower right-hand corner of the screen. "With the end of the quarter June 30th, the media is going to pay close attention. A contribution today will help show the strength of my campaign and it'll help me take my message to the American people."

The overlay is called an "iAd," which allows a host to superimpose a video message on a Web page, with the goal of increasing interest and user traffic.

"We are always looking for new ways to engage voters by incorporating the latest technology in our campaign and discovered the technology during that search," said Romney spokesman Kevin Madden.

The campaign first used an "iAd" last month, when Romney was trying to enlist 24,000 new volunteers in a single day. It reappeared Wednesday amid the final throes of the second-quarter fundraising push.

On Tuesday, Democrat Hillary Rodham Clinton posted a new video on her campaign Web site, spoofing "The Sopranos" finale and showing the New York senator and her husband, former President Clinton, discussing her contest to select a new theme song.

When the film ended, viewers clicked on a link and were taken to a page revealing the winning song _ as well as seeking a donation.

The campaign said the Web site got more than 500,000 hits.

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CONCORD, N.H. (AP) _ Presidential hopeful Mitt Romney's campaign is denying a report that aides pulled over a New York Times reporter trailing the former governor's caravan in New Hampshire, checked his license plates and told him to leave.

In a story profiling Romney in Saturday editions, the reporter, Mark Leibovich, wrote that while following Romney's caravan last month, an aide stopped him and told him his plates had been run.

"As we reported, I was instructed to veer off, which to me is the same as telling someone to leave," Leibovich said in an interview. "I obviously cannot speak to whether they ran my license plate or not. I can only speak to what the person told me he was doing."

New Hampshire law does not allow campaign aides access to license plate databases, nor does it allow private staffers to pull over fellow citizens.

Romney spokesman Matt Rhoades said Wednesday that the campaign did not stop Leibovich.

"We will not comment on security procedures for the governor," Rhoades said. "We can confirm, though, that at no time was the reporter's license plate run through a check or was his vehicle pulled over."

Romney's campaign said the group became lost on back roads after a May 29 stop at Harvey's Bakery in Dover. A construction detour confused them, the cars stopped, and the staffer walked back to chat with the unknown car.

Romney travels with aides to campaign stops. The former Massachusetts governor does not have state-provided protection or a Secret Service detail. He does, however, travel between appearances in a motorcade of black sport utility vehicles and his aides wear earpieces.