1. Sarah Palin and the "Bridge to Nowhere"—Palin has said that she told Congress, "Thanks, but no thanks," about the $400 million Alaska bridge project. But when running for governor in 2006, Palin supported the bridge. Once she became governor, she began to shift her position.
2. Joe Biden on the vice presidency—In April 2007, he said he would not be VP "under any circumstances"; in June 2008, he said, "I am not interested in the vice presidency." Now he's Barack Obama's running mate.
3. Barack Obama on using the Strategic Petroleum Reserve--Obama's energy plan, released August 4, proposes tapping into the Strategic Petroleum Reserve to relieve high gas prices in the short term. In July, Obama said that we should not use strategic oil reserves at this point.
4. John McCain on the Bush tax cuts—McCain opposed tax cuts proposed by President Bush in 2001 and 2003, but when they came up for renewal in 2006, he voted in favor of them.
5. Barack Obama on campaign financing—In the fall of 2007, Obama said he would "aggressively pursue an agreement with the Republican nominee to preserve a publicly financed general election." In June of 2008, Obama announced he would not participate in the public financing system.