From Numbers USA (link):

Leaders of most of the nation's evangelical Christians made a shocking endorsement of illegal-alien amnesty today [Oct. 8] in Senate testimony.

Their spokesman -- the head of the National Association of Evangelicals (NAE) -- said high immigration is increasing membership in evangelical churches and is good for the economy...

...Rev. Leith Anderson, president of the NAE, was invited by Sen. Schumer (D-N.Y.) to testify in favor of the Senate immigration chairman's push to create amnesty legislation this fall.

Sen. Schumer asked Rev. Anderson if many of his colleagues agree with his support for legalizing 12-20 million illegal aliens and increasing the legal immigration far higher than the 1 million a year current level (the two key components of "comprehensive immigration reform").

Rev. Anderson answered that there was no dissent in adopting the pro-amnesty resolution on the 75-member NAE board of directors.

There's a list of the denominations and their contact information at the link above, and NumbersUSA also suggests sending a link to "Most National Christian Leaders Declare War on Unemployed in Their Pews -- and on the street" (link) to your pastors and other religious leaders.

10/19/09 UPDATE: See Leith Anderson of NAE misled: NAE member Salvation Army is "neutral" on amnesty.

10/21/09 UPDATE: Anderson was being even more misleading: only 11 out of the 40 NAE member denominations have signed on. See the update at the previous link.