Who's more liberal Hillary or Barak?

Though you wouldn't know it from media portrayals of Obama, he had the most liberal Senate voting record in 2007 according to a National Journal report. The Journal story did note there aren't a lot of policy differences between Clinton and Obama.

Sen. Barack Obama, D-Ill., was the most liberal senator in 2007, according to National Journal's 27th annual vote ratings. The insurgent presidential candidate shifted further to the left last year in the run-up to the primaries, after ranking as the 16th- and 10th-most-liberal during his first two years in the Senate.

Sen. Hillary Rodham Clinton, D-N.Y., the other front-runner in the Democratic presidential race, also shifted to the left last year. She ranked as the 16th-most-liberal senator in the 2007 ratings, a computer-assisted analysis that used 99 key Senate votes, selected by NJ reporters and editors, to place every senator on a liberal-to-conservative scale in each of three issue categories. In 2006, Clinton was the 32nd-most-liberal senator.

In their yearlong race for the Democratic presidential nomination, Obama and Clinton have had strikingly similar voting records. Of the 267 measures on which both senators cast votes in 2007, the two differed on only 10. "The policy differences between Clinton and Obama are so slight they are almost nonexistent to the average voter," said Richard Lau, a Rutgers University political scientist.

But differences define campaigns. The yeas and nays matter. And in a Senate in which party-line votes are the rule, the rare exceptions help to show how two senators who seemed like ideological twins in 2007 were not actually identical. Obama and Clinton were more like fraternal policy twins, NJ's vote ratings show.

I suspect if Obama wins the Democratic nomination his positions and policies will no doubt come under much greater scrutiny than the current focus on his rhetorical skills.