The National Journal--a political magazine--ranked Democratic Party presidential candidate Barrack Obama as the most "liberal" member of the United States Senate. Hillary Clinton, the other Democratic Party candidate for president, ranked 16th. The magazine calculated the ranking by looking at 99 votes by the Senators in 2007. The votes were tallied across a variety of issues including the economy (36), social issues (34), and foreign policy (29). The survey tracks votes on everything from Iraq War spending to stem cell research. The magazine used a methodology designed to rank the Senators in relation to the other Senators while also taking into account their individual votes. Unfortunately, the magazine made little effort to explain the term "liberal." Aside from the utility in providing the summary of votes by Clinton and Obama on a number of important issues, it also provides a record of the similarities between the two candidates. Despite all of the campaign rhetoric, when one considers their actual voting records, the candidates differed on just ten of the 267 measures they both voted on.