Al Gore maintains that he won't seek the Democratic nomination for president in 2008 — but his actions seem to belie his words. Gore has kept himself very much in the public eye as the White House races kicked into gear, providing plenty of evidence that he is indeed eying another run for president: His award-winning global warming documentary "An Inconvenient Truth" brought him back into the limelight last year. His new book "An Assault on Reason" is a best seller, and when he launched his national book tour in May, one observer said the event seemed "more like a...