On the bottom tier are Ohio Congressman Dennis Kucinich and former Alaska Sen. Mike Gravel, who are not waging serious campaigns.
Do you see that, Dennis? Not waging serious campaigns. Now take your ball and go home.
Also within that article:
The top of this party's second tier is clearly held by New Mexico Gov. Bill Richardson. He puts together a nice combination of executive experience as governor and federal service as a member of Congress, energy secretary and U.N. ambassador. As someone of Latino ancestry, he's in a position to attract those voters, though that will be of limited help to him in lily-white Iowa.
He seems to enjoy campaigning and is something of the happy warrior in the race. Right now, he's the second-tier candidate who seems most likely to break from the pack in Iowa. Some say he's positioning himself for vice president, and that could happen, too. (See above mention of Daddy Bush.)
A nice assessment of Bill Richardson, although I'm sure he's not saying that he's trying to come in as veep.
ps: The lunacy tag applies only to Dennis. And Gravel.