Click here to watch "Gimmick."

In a concerted effort, MoveOn.org and the Sierra Club unveiled ads today deriding John McCain's proposal for offshore drilling. The ads are part of a national campaign, also including Campaign Money Watch, focusing on energy and gasoline prices.

MoveOn.org's "Gimmick" (subscription) features a middle-aged father sitting in a living room. "Senator McCain, you let me and my kids down," he says into the camera. "From the very beginning, I told them, 'This is a principled guy.' So when you said you were going to help me drive affordably again, I believed you." The man goes on to claim that McCain's offshore drilling proposal won't make a substantial difference in gas prices: "That's not a solution, Mr. McCain. That's a gimmick. We expected better."

The ad's setting and tone echo "Not Alex" (subscription), MoveOn's controversial June ad that featured a woman talking directly to McCain about how his Iraq policies were a threat to her infant son. In a conference call today with reporters, MoveOn Executive Director Eli Pariser said the overwhelming success of "Not Alex" -- as evidenced by a survey The Hill recently conducted -- prompted the organization to take that route again in this ad.

"We want to bring real voices into the debate," Pariser said. "Gimmick" "builds on this theme we started with the 'Alex' commercial -- a real person talking to the camera about an important issue."

The Sierra Club takes the domestic drilling debate a step further in "Full-Nelson" (subscription), both denouncing McCain's proposals and then commending Barack Obama's plans, including investing in clean energy options and giving families energy tax rebates. The ad, the Club's first in the presidential election, is airing in Washington D.C., and the battleground states of New Hampshire, Colorado and Ohio. (MoveOn hasn't yet determined the markets for its ad, which isn't running until Monday).

"Big oil companies... are getting billions from the government, raking in record profits, while we pay more and more for gas," an announcer says in "Full Nelson." "John McCain's answer? Another $4 billion giveaway to Big Oil."

Sierra Club Political Director Cathy Duvall, also speaking with reporters in the teleconference, said McCain offers more of the same Bush administration energy policies.

"His plan would benefit the bottom lines of the oil companies that just made these record and obscene profits," Duvall said, referring to reports today of Exxon Mobil raking in the most quarterly profits of any U.S. corporation ever -- more than $11.5 billion. "Obama has promised to take on these oil companies. His plan would benefit hard-working Americans," Duvall said. The Sierra Club officially endorsed the Illinois senator on June 20.

The McCain campaign doesn't comment on third-party ads, but Republican National Committee spokeswoman Blair Latoff responded in a statement, per the Boston Globe: "Barack Obama and his special interest friends may believe that Americans should deal with high gas prices by inflating their tires but Americans overwhelmingly agree with John McCain's balanced approach."

CNN/Opinion Research Center polling released this week shows Americans favoring offshore drilling -- but also blaming oil companies for high gas prices.