The strategy involves Obama's supporters visiting churches and introducing themselves during Sunday service in order to say a few words about the Senator. As a campaign policy the concept get's a thumbs down. John Andrews is the former Senate President in the Colorado legislature.

"I would think long and hard about that kind of shot-gun approach."

That's a candidate's view.  We checked also with a campaign management firm.  Steve Kush of Kush and Associates in Washington D.C. sees it as on the knife’s edge legality.

"You shouldn't straddle the line.  If you have to ask ‘is this ok, then don't do it."

And Douglas Napier, an attorney at the Alliance Defense Fund, says such endorsements by church visitors are certainly a danger for the church's non-profit status.

"It's the perfect storm because the candidate walks away scot-free. It's the church that gets stung."

Len Munsil was a candidate for Governor of Arizona in 2006.  His campaign stayed out of churches.

"As a Christian candidate myself, I made the decision that I wasn't comfortable campaigning in churches, period." 

Tom Minnery, Vice-President of Public Policy at Focus on the Family Action, draws a precise line.  

"We think campaigning in a church worship service on Sunday mornings, is not appropriate. We would never from Focus on the Family Action give anyone advice that approaches this brazenness."

The overwhelming view is: at your church, don't give a soap-box to anyone representing a candidate.  But Pastors: know you can speak on issues, if you don't tie them to a candidate.