According to the 2008 Congressional Pig Book from the private, non-partisan watchdog group Concerned Citizens Against Government Waste: Pork in the Presidential Race The Swine Line Sen. Barack Obamas (D-Ill.) 2007 rating was 10 percent, making his lifetime score 18 percent. The 2008 Congressional Pig Book contained 53 earmarks worth $97.4 million for Sen. Obama, including $1,648,850 for the Shedd Aquarium. Sen. Joe Biden (D-Del.) received the worst possible rating in 2007 with 0 percent, while his lifetime rating is 22 percent. According to the Pig Book, Sen. Biden had 70 earmarks for a total of $119.7 million in fiscal year 2008, including $246,100 for the Grand Opera House in Wilmington. Sen. John McCain (R-Ariz.) received a score of 100 percent and has a lifetime rating of 88, has never requested nor received a single earmark, and has pledged to veto any spending bill that contains any earmarks. Obama, Biden and McCain are all part of the same Congress with lower approval ratings than Bush, an historic low percent. Not too difficult to figure out which of these Senators contributed to that fact.