(RNS) After years of shunning the partisan political spotlight, is Billy Graham a born-again Republican?

In May, the elderly evangelist was featured in an ad supporting a North Carolina referendum that would ban gay marriage.

After a recent meeting with GOP presidential nominee Mitt Romney, the Billy Graham Evangelistic Association scrubbed language describing Mormonism as a "cult" from its website.

Two days later, the ministry announced a "vote biblical values" campaign, with Graham's photo and signature accompanying a statement that opposed abortion and supported traditional marriage. Funded by specially designated donations from ministry supporters, the campaign includes newspaper ads and a website with downloadable posters and bulletin inserts.

Why has the famed evangelist -- who has said he has learned hard lessons about being too political -- getting so involved in the 2012 elections?

Experts who've watched Graham's decades-long career say 2012 marks a new trajectory for the 93-year-old evangelist, and they speculate that Franklin Graham, his son and the president of the Billy Graham Evangelistic Association, could be playing a primary role.

"If not a new turn, he's further down the road, with expressing a preference for a candidate," said William Martin, author of "A Prophet With Honor," a 1992 biography of Billy Graham. "I'm reasonably certain that he's not done this before."

At Romney's meeting with both Grahams in North Carolina, Billy Graham told Romney he would "do all I can to help you," according to a Romney campaign aide. Though the "vote biblical values" campaign does not mention Romney by name, it dovetails with his policies. President Barack Obama's has said he personally supports same-sex marriage, and his campaign faith platform describes him as "pro-choice."

Martin said Graham -- who's met with every president since Harry Truman -- has often been coy about those relationships, while his son has not. The new BGEA campaign is "more in line" with the son's historical behavior than the father's, Martin said.

"I think that Franklin has an influence in there," Martin said. "But I can't say ... that he is leading his father to do something that he's not willing to do."

Martin said Graham's seal of approval could serve to ease some evangelicals' lingering discomfort with Romney's Mormon faith. "Having Billy Graham's blessing on Gov. Romney would certainly free people of reservations on that score," Martin said.

Michael Hamilton, who chairs the history department at evangelical Seattle Pacific University, also sees the son's hand behind Billy Graham's political involvement.

"The 'vote biblical values' campaign repeats the slogans of the religious right in ways that Billy Graham never did until he was very old and frail," Hamilton said. "I think it would be more reasonable for the media and for Americans to interpret these statements as the statements of the Billy Graham Evangelistic Association and its current president, Franklin Graham, as opposed to the statements of Billy Graham himself."

Asked if he was surprised about his grandfather's involvement in the "biblical values" campaign, the Rev. Tullian Tchividjian, Billy Graham's grandson, said both yes and no.

"It's closer than he's been in a long, long time in my opinion, to get involved in something like this," said Tchividjian.

He has remembered his grandfather feeling the fallout of his close friendship and support for President Richard Nixon, which led him to a divine warning that he was a primarily a preacher and not a politician.

But Tchividjian expects that it was "an idea that was presented to him" -- he said he did not know by whom -- and it made sense as an elder "statesman" to speak out on issues he's long believed represented the Bible's teaching.

"It's probably not something that he came up with on his own," said Tchividjian, noting his grandfather's almost 94 years. "Nobody in the organization, including my uncle, would have done it if my grandfather had not agreed to it or signed off on it."

Time will tell if this foray into the political realm will affect Graham's long-term legacy.

"In the eyes and minds of some people, it could enhance his legacy," said Tchividjian, pastor of Coral Ridge Presbyterian Church in Fort Lauderdale, Fla., where the Rev. D. James Kennedy, an icon of the religious right, was the longtime pastor. "In the minds and eyes of other people, it could diminish it."

Mark DeMoss, a spokesman for Franklin Graham, and a key liaison between Romney and evangelicals, was not available for an interview beyond the BGEA statement, which noted that the ad did not endorse any candidate or political party.

The elder Graham's spokesman, A. Larry Ross, said the ad is "consistent" with the BGEA's mission and Graham's personal practice of staying "politically neutral" in his public ministry.

"He is challenging citizens -- particularly the faith community -- on how to vote, rather than for whom to vote," Ross said.

Martin has been working on new chapters of his Graham biography, and now says he will have to rework them.

"Now I think I must go back and take something out and put in something about these latest developments," Martin said. "I can't leave that out."

Tchividjian, who can no longer speak to his grandfather by phone because of the elder Graham's severe hearing loss, said he'll have to wait a couple of weeks to ask him in person about his election-related activities.

"The next time I see him will be after the election," he said, "so I'm sure we'll have plenty to talk about."

Click through the slideshow to see most and least Christian states in the United States:

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  • Utah

    78,438 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/1/1a/Parowan_Utah_Church.jpg" target="_hplink">here</a>.

  • North Dakota

    66,950 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:Catholic_Church_in_Warsaw,_North_Dakota.jpg" target="_hplink">here</a>.

  • Alabama

    62,467 Christian adherents per 100,000 people. Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:16th_Street_Baptist_Church.JPG" target="_hplink">here</a>.

  • Louisiana

    59,598 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:St._Stephens_Episcopal_Church_(Innis,_Louisiana).jpg" target="_hplink">here</a>.

  • Oklahoma

    58,598 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:Catesby_Oklahoma_Church.jpg" target="_hplink">here</a>.

  • Mississippi

    58,342 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Mississippi_Church.jpg" target="_hplink">here</a>.

  • South Dakota

    58,212 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Methodist_Episcopal_Church_Pierre_South_Dakota.JPG" target="_hplink">here</a>.

  • Minnesota

    55,280 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Church_near_Flom,_Minnesota.jpg" target="_hplink">here</a>.

  • Massachusetts

    55,023 Christian adherents per 100,000 people. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Sandwich_Church,_Massachusetts.jpg" target="_hplink">here</a>.

  • Arkansas

    54,985 Christian adherents per 100,000 people. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Our_Lady_of_Perpetual_Help_Church_silhouette_altus_arkansas.jpg" target="_hplink">here</a>.

  • Nebraska

    54,776 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/b/b5/Visitation_Church_%28O'Connor%2C_Nebraska%29_church_from_S.JPG" target="_hplink">here</a>.

  • Tennessee

    54,764 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/1/1e/First_Baptist_Church_Donelson_Tennessee_04032012.JPG" target="_hplink">here</a>.

  • Rhode Island

    53,576 Christian adherents per 100,000 persons.

  • Texas

    53,525 Christian adherents per 100,000 persons.

  • Iowa

    53,403 Christian adherents per 100,000 persons.

  • Wisconsin

    52,863 Christian adherents per 100,000 persons.

  • Pennsylvania

    51,883 Christian adherents per 100,000 persons.

  • Illinois

    51,442 Christian adherents per 100,000 persons.

  • South Carolina

    51,374 Christian adherents per 100,000 persons.

  • Kentucky

    51,055 Christian adherents per 100,000 persons.

  • Idaho

    50,695 Christian adherents per 100,000 persons.

  • District of Columbia

    49,903 Christian adherents per 100,000 persons.

  • Kansas

    49,666 Christian adherents per 100,000 persons.

  • New Jersey

    49,575 Christian adherents per 100,000 persons.

  • Georgia

    49,374 Christian adherents per 100,000 persons. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Washington_(Georgia)_Presbyterian_Church.JPG" target="_hplink">here</a>.

  • Connecticut

    49,096 Christian adherents per 100,000 persons.

  • New Mexico

    49,044 Christian adherents per 100,000 persons.

  • Missouri

    48,436 Christian adherents per 100,000 persons.

  • North Carolina

    46,737 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Carolina_Baptist_Church.jpg" target="_hplink">here</a>.

  • New York

    44,488 Christian adherents per 100,000 persons. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Church_in_Rye,_New_York.jpg" target="_hplink">here</a>.

  • Indiana

    43,788 Christian adherents per 100,000 persons.

  • Ohio

    42,744 Christian adherents per 100,000 persons.

  • California

    42,430 Christian adherents per 100,000 persons.

  • Virginia

    41,304 Christian adherents per 100,000 persons.

  • Michigan

    40,186 Christian adherents per 100,000 persons.

  • Delaware

    39,575 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Christ_Church,_Dover,_Delaware.JPG" target="_hplink">here</a>.

  • Wyoming

    39,341 Christian adherents per 100,000 persons.

  • Maryland

    39,214 Christian adherents per 100,000 persons.

  • Montana

    37,824 Christian adherents per 100,000 persons.

  • Florida

    37,104 Christian adherents per 100,000 persons.

  • Colorado

    36,461 Christian adherents per 100,000 persons.

  • Hawaii

    36,103 Christian adherents per 100,000 persons.

  • Arizona

    35,842 Christian adherents per 100,000 persons.

  • West Virginia

    35,211 Christian adherents per 100,000 persons.

  • New Hampshire

    34,617 Christian adherents per 100,000 persons.

  • Nevada

    33,395 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/f/f2/StJoanofArcCatholicChurch_in_Las_Vegas_founded_1910.jpg" target="_hplink">here</a>.

  • Washington

    33,065 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:Methodist_Church_at_Historic_Washington_State_Park_IMG_1467.JPG" target="_hplink">here</a>.

  • Vermont

    32,954 Christian adherents per 100,000 persons.

  • Alaska

    32,810 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/1/17/Orthodox_church_in_Seldovia%2C_Alaska.jpg" target="_hplink">here</a>.

  • Oregon

    30,101 Christian adherents per 100,000 persons.

  • Maine

    27,098 Christian adherents per 100,000 persons.

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