(RNS) Mitt Romney has trounced Rick Santorum, an ardent Catholic, among Catholic voters, but Romney's support among evangelicals has wavered thus far in the GOP presidential primary, according to a new analysis of exit poll data.

Though he won evangelicals in two states, in general Romney has performed 15 percentage points better among non-evangelicals, according to an analysis released Friday (March 2) by the Pew Forum on Religion & Public Life.