Some of those who signed the letter said they were concerned about the issue because they associated global warming with "leftists" and limits on free enterprise, which they have long opposed.
Columnist Dreher believes the letter was a mistake and doesn't take into consideration younger members.
"The young don't have a problem with gay marriage," said Dreher. "As the older conservatives die off, it's not going to be an issue anymore. It's futile to spend our time on this issue. As for abortion though, I'm glad to see 'partial birth' rolled back though we'll never totally get rid of abortion because this is generally a pro-choice country."
There is also an emerging consensus that the war in Iraq has undercut evangelical support for the Bush administration.
"I don't think they (the Bush administration) really cares about what really concerns social conservatives; the breakdown of family," said Dreher. "They treat religious and social conservatives like useful idiots."
Will Evangelicals Turn to Democrats?
In 2000 and 2004, evangelicals rallied behind Bush. There was a lot of enthusiasm which helped in getting out the vote. But the lingering war in Iraq and the failure to get its agenda passed has left many evangelicals disillusioned.
"It is so clear that things have collapsed around Bush, a lot of the independents who were leaning toward Republicans are now leaning toward Democrats -- especially younger voters," said Dreher. "Republicans are out of ideas and there's a lot of anger toward Bush regarding the Iraq war. The war made me realize the danger of being tied in as a religious voter to the Republican party. A lot of evangelicals are also upset about all the spending. We're looking for a Messiah to save us."
Handicapping Republican candidates is dangerous but Green of the Pew Forum offered the following. "First, our polling shows a lot of evangelicals are undecided but some like John McCain because he's a conservative candidate, many like Brownback but few have ever heard of him and the same for Huckabee."
What about Giuliani and Romney?
"Some surveys show 25 to 40 per-cent of evangelicals cannot support a Mormon candidate. This poses a challenge for Governor Romney. It's an issue he needs to address," said Green. "But if he were to win the primary a lot of evangelicals will vote for him because even being a Mormon he'd be better than a Democrat. Rudy Giuliani might be a good president but he won't press hard on the evangelical agenda."
Nearly everyone interviewed for this article pointed out that evangelicals are frustrated because they believe that their support for Republicans resulted in little change that would benefit their core issues.
That said, the chances for Democrats running away with the evangelical vote are slim.
"Our people aren't for Democrats," said columnist Dreher. "They are simply sick of Republicans, the so called grand coalition, the fusionist coalition that came about after Goldwater held pretty well since Reagan brought it to power. But now, that's out of gas, it's gone."
That leaves many conservative Christians in a quandary.
"Maybe some will stay home," said Dreher. "They've supported Republicans and nothing has happened. At this time, there is simply no consensus pick."
Evangelicals See an Evolution of Their Own