Investigating Televangelist Finances

Joyce Meyer, on screen at an Atlanta gathering.

One change Grassley could seek, says Pablo Eisenberg, a nonprofit expert at the Georgetown Public Policy Institute, would be to impose limits on how much leaders of nonprofit organizations can earn. Congress could also try to demand stricter boundaries between preachers and boards of trustees.

Owens has challenged Grassley to subpoena the desired information. So far Grassley has resisted taking that route, but he says he has no plans to back down. "I think there is some gamble for people who are stonewalling," he said. "Every organization I have requested information from, I have gotten voluntarily."