Indeed

Matthew Yglesias (July 01, 2008) - Who Is Barack Obama? (Miscellaneous)

Now of course it's possible -- likely, even -- that many Americans
don't know what road Obama would go down as president. But he's
unveiled a fairly detailed policy record, and assembled a fairly
consistent record in public life. It's John McCain, by contrast, who was against the Bush tax cuts before he was against them it's McCain who sponsored an immigration reform bill and then said he would have written against it. It's McCain who wants credit for tackling climate change but opposes all legislation aimed at curbing carbon emissions. It's McCain who's trying to run on an appealing biography while leaving cloudy impressions of his policy agenda.