According to the Obama and McCain camps, it's the other guy. The Hill reports:

With the presidential campaign in full swing, Sens. John McCain (R-Ariz.. and Barack Obama (D-Ill.) and their surrogates are trying to label each other as "flip-floppers," a characterization that they hope will stick and be as effective this year as it was in 2004.

Both candidates this week reversed course on significant positions. Obama said he would opt out of public financing for the general election while McCain stated that he now supports drilling off the coast if states give their consent.

Will "flip-flop" have the same zing it did four years ago? It depends on the topic: "Despite opening themselves to criticism from the other side and damning editorials from across the country," the article points out, "the position changes could also pay huge dividends for the candidates."

Obama's decision to decline public funding will allow him to raise unprecedented amounts for the general elections. He will likely enjoy a major financial edge over McCain in the general election, which would allow him to take the fight to the Republican in more states.

Meantime, for McCain his reversal on drilling could help him with voters who are fed up with soaring gas prices. It allows the Republican to draw a clear distinction between himself and Obama, who has been hammered for a remark he made that indicates that he is supportive of a gradual increase of gas prices.