The grandson of former president Jimmy Carter told NBC News that he was motivated by Republican attacks on his grandfather's foreign policy record to help leak a secretly recorded video that has become the most recent setback for the Mitt Romney campaign.

The video, which was originally provided to the liberal magazine Mother Jones, shows Romney telling wealthy donors that “47%” of the country “who are dependent on government” and “who believe they are victims” will vote for Obama no matter.

While Romney was attempting to argue that his campaign strategy must be to focus on swaying “the 5 to 10% in the center that are independents,” his words prompted the Obama camp to accuse the GOP presidential candidate of being opposed to half the electorate.

James Carter IV, who is 35 and unemployed, said he helped persuade the person who filmed the May 17 fundraiser in Boca Raton, Florida, to leak the video to the press. Carter described himself as a “partisan Democrat” devoted to getting president Obama reelected.

“It gets under my skin — mostly the weakness on the foreign policy stuff," Carter told NBC. "I just think it's ridiculous. I don’t like criticism of my family."

While Jimmy Carter is notorious for his blatant anti-Israel stance, Romney is seen as a staunch supporter of the Jewish state.

Former President Carter recently addressed the Democratic National Convention in Charlotte, North Carolina, despite opposition from the Republican Jewish Coalition as well as the National Jewish Democratic Council and many others.

Among the countless examples of President Carter’s viciously anti-Israel sentiments, his 2007 book, titled “Peace Not Apartheid,” contains numerous falsehoods about Israel, including the insinuation in its title that Israel resembles the apartheid regime of South Africa.