This time, the coal clip followed the same path to prominence as the previous  mini-scandal: from YouTube, to right-wing blog, to the Drudge Report, to Fox  News to McCain stump speech.
Obama was discussing his support for a cap  & trade system to reduce carbon emissions, which would create a market on  which companies could trade emissions credits. 
Such a system, proponents  say, would reduce pollution while spurring investment in cleaner sources of  energy. Obama also has said he supports "clean coal" technology, which  researchers hope would allow exploitation of coal power without as much  pollution. 
"So if somebody wants to build a coal-powered plant, they  can; it's just that it will bankrupt them because they're going to be charged a  huge sum for all that greenhouse gas that's being emitted," Obama said in  January, referring to traditional coal plants.
Suddenly worried about all  the jobs such "bankrupting" would cause, McCain made the line a central point  when he spoke in Virginia Monday. The GOP candidate trails there and in Ohio,  two states President Bush carried in 2000 and 2004. 
The union  representing coal miners came to Obama's defense Monday. 
"Sen. John  McCain and his running mate, Gov. Sarah Palin, have once again demonstrated that  they are willing to say anything and do anything to win this election. Their  latest twisting of the truth is about coal and some comments Sen. Obama made  last January about the future use of coal in America," said Cecil E. Roberts,  president of the United Mine Workers of America, in a statement released Monday  afternoon. 
Roberts noted that McCain and the Republicans ignored Obama's  overall point during his interview.
The Democratic candidate told the  Chronicle, "This notion of no coal, I think, is an illusion," noting the amount  of energy the US dervies from coal. Obama pushed for development of technology  to sequester carbon emissions, the central tenant of so called "clean"  coal.
"Despite what the McCain campaign and some far right-wing blogs  would have Americans believe, Sen. Obama has been and remains a tremendous  supporter of coal and the future of coal," Roberts said. 
The coal issue  is a particularly tricky one for McCain. Before he became the Republican Party's  presidential nominee, McCain demonstrated his willingness to diverge from GOP  orthodoxy on climate change and environmental regulation. In 2003, he and Sen.  Joe Lieberman co-sponsored 
one  of the first cap and trade bills in the Senate aimed at reducing carbon  emissions. McCain removed his name from a similar measure that was debated  earlier this year. 
Indeed, on his Web site, McCain 
still  touts his proposal for a cap and trade system and development of  low-emissions alternatives. Surely he and Obama would quibble on the details of  such a system, but they share the same basic goals. 
Nonetheless, the  coal industry traditionally supports Republicans, and John McCain is now the  party's nominee. So the industry is doing its part to flog the campaign's latest  talking point painting Obama as anti-coal. 
"Regardless of the timing or  method of the release of these remarks, the message from the Democratic  candidate for President could not be clearer: the Obama-Biden ticket spells  disaster for America's coal industry and the tens of thousands of Americans who  work in it," said Mike Carey, president of the Ohio Coal Association and a  short-lived former Republican congressional candidate.