John McCain leads Barack Obama 50 percent to 40 percent among voters who say religion is an important part of their daily lives while Obama leads McCain 55 percent to 36 percent among those who are less religious, according to Gallup data collected between March and June.

McCain's lead among more religious voters is even higher among white Protestants 63 percent to 27 percent) and white Catholics (53 percent to 37 percent). Less religious white Protestants and Catholics split fairly evenly between the two. However, Hispanic Catholics who say religion is important to them support Obama 57 percent to 31 percent and he leads 90 percent to 4 percent among black non-catholic Christians who describe themselves as religious. Jewish voters who say religion is an important part of their daily lives (and their numbers are smaller than the other groups) split evenly at 45 percent each for Obama and McCain. Non-religious Jews back Obama 68 percent to 26 percent.