Ruth Marcus, a renowned Washington Post columnist, has this column, suggesting that Arizona’s public funding program, implemented in 1998, has had the effect of electing more conservatives to the legislature than would otherwise be the case.
The column does not say, but others have said, that the public funding program, which requires candidates to obtain $5 contributions from a specified number of donors, has helped candidates who are members of large churches. Social connections between church members make it more likely for candidates who are church members to find enough people willing to contribute the needed $5, and therefore easier for them to qualify for public funding. Thanks to Rick Hasen for the link.