Here is the link to The Barna Report (as referenced on The Jesus Creed)
As was true in the past two presidential elections, two-thirds of all evangelicals who were registered to vote (65%) were aligned with the Republican Party. One out of five (21%) was Democrats and just one out of ten (10%) was registered independent of a party. That puts evangelicals at odds with the national voter profile, which shows a plurality of Democrats (42%), one-third Republican (34%) and two out of ten (20%) independent of a party affiliation.
Most remarkably, however, was the overwhelming support registered among evangelicals for Republican candidate John McCain. In total, 88% voted for Sen. McCain, compared to just 11% for Sen. Obama. The 88% is statistically identical to the 85% of evangelicals who backed George W. Bush in 2004. Surveys conducted by Barna throughout the campaign season showed that evangelicals were not enthusiastic about either candidate, but on Election Day evangelicals came through in a big way for the most conservative major candidate on the ballot.