Washington, Sept.17 : Republican presidential nominee John McCain is likely to face an unprecedented wave of negative advertisements from the Obama campaign in retaliation to the "less than truthful" two advertisements that McCain took out against Obama.
With McCain maintaining his improved performance in the polls since picking Alaska Governor Sarah Palin as his running mate, the alarmed Obama campaign plans to flood swing states with adverts, emails and mail shots to shore up their candidate's irreversible down swing of the past seven weeks, reports The Telegraph.
MoveOn, a liberal group that started during the Bill Clinton impeachment hearings, said it will double its advertising budget to 3.5 million pounds between now and November 4.
Its executive director Eli Pariser said: "In last three weeks or so our membership has galvanized to a greater degree than in 2004."
The organization will this week launch ads tying McCain to Washington lobbyists.
The Service Employees International Union, the country's largest health care union, has just started a 1.1 million pound ad campaign in six swing states for two weeks that denounces the Arizona senator's record on the economy.
It features a family where the father has lost his job and the mother is working two shifts.
"Unfortunately, this is the kind of story we're hearing from too many families in every corner of America," said SEIU Secretary-Treasurer Anna Burger.
"Make no mistake - this election has enormous consequences for American families," she added.
By law, outside groups cannot coordinate their efforts with the campaigns, but they take their cues from news events and from the ad strategies and messages that the campaigns themselves undertake.
During the Democratic and Republican primary contests, McCain and Obama criticized outside groups, even those that came to their aid. But lately both campaigns have responded to their respective help with silence.
Right-wing groups are also gearing up to broadcast material favouring the Republican, following a 1.45 million pound ad produced by the American Issues Project last month that questioned Obama's association with the 1960s radical Bill Ayers.
Mr Obama was forced to respond, targeting markets with twice as many commercials.
Activist groups are commonly known as 527s, for the section of the tax code that regulates them. The most effective 527 campaign so far was the Swift Boat Veterans for Truth, which in 2004 effectively besmirched Senator John Kerry's hitherto unquestioned war record.