The IRS also came after Billy Graham, his son charged Tuesday in a letter to President Barack Obama, POLITICO reports. Franklin Graham, president of the Billy Graham Evangelistic Association and Samaritan's Purse, said the IRS notified the organizations in September that it was conducting a "review" of their activities for tax year 2010. With the IRS admitting it gave extra scrutiny to conservative political organizations, Graham says he now believes that the review was part of an Obama administration effort of "targeting and attempting to intimidate us." The Billy Graham Evangelistic Association's urging of voters to back "candidates who base their decisions on biblical principles and support the nation of Israel" during last year's presidential race was the reason why IRS agents visited the North Carolina offices of both Graham groups, the letter accuses. "While these audits not only wasted taxpayer money, they wasted money contributed by donors for ministry purposes as we had to spend precious resources servicing the IRS agents in our offices," Graham wrote in the letter. "I believe that someone in the administration was targeting and attempting to intimidate us. This is morally wrong and unethical -- indeed some would call it 'un-American.'" Graham said that "in light" of the IRS admission that it targeted tea party groups for added scrutiny, "I do not believe that the IRS audit of our two organizations last year is a coincidence -- or justifiable."