To anyone who thinks Ralph Nader's entrance into the 2008 presidential race will make a difference in the outcome -- like it did in 2000, when he picked up 2.7 percent of the national popular vote and essentially cost Al Gore the race -- it's worth remembering this:

Nader also ran in the 2004 election, and he got a whopping three-tenths of 1 percent of the vote.

He'll be lucky to get half of that this year.