President Obama's endorsement of gay marriage isn't sitting well with many evangelical pastors.

Pastor Allen McFarland, in Portsmouth, Va., said he'd already voiced his concerns about the matter to his congregation.

"I voted for Obama because I wanted to see an African American president. I couldn't vote for the last person, the Republican. He didn't hold my views and I thought Obama did," McFarland told CBN News.

"But hearing what he said yesterday, I was very concerned, and I shared with the congregation that we have a problem as to who to vote for," he added.

Pastor Charles Bagi, in Chesapeake, Va., categorically denounced Obama's position, suggesting his endorsement of gay marriage did not bode well for the nation.

"No nation, empire, kingdom has ever lasted as a world power if it let the bonds of marriage fall, openly acknowledge and allow the practice of homosexuality… not only that but the other perversions that will follow it," he warned.

Rev. Franklin Graham has also denounced Obama's reversal, saying he has "shaken his fist" at God. For more on that story, click here.