Graham's son, the Rev. Franklin Graham, has been at the center of controversy recently after the Pentagon disinvited him from leading and attending a National Day of Prayer event because of controversial remarks he made about Islam, which he described as "evil."
The Pentagon service is attended by mainline Protestants, Muslims and Jews.
Graham staged a small protest this morning outside the Pentagon, where he held a short prayer on an adjacent sidewalk with his wife and a few others. "As a Christian, why I can't have the same right" to say that I worship a different God than Muslims and Hindus, Graham told reporters. "It looks like Islam has gotten a pass. … We're losing our freedoms while others are getting more."
"We are fooling ourselves if we think we can have some big kumbaya service and all hold hands and it's all going to get better in this world," Graham told USA Today Wednesday. "It's not going to get better."
Still, an overwhelming majority of Americans -– 92 percent -– say they believe in God, according to the most recent USA Today-Gallup poll. Most also favor the National Day of Prayer, with only 4.5 percent opposed.
"It's a sad day in America when an atheist in Wisconsin can undermine this tradition for millions of others who simply wish to join their fellow citizens in praying for their country," the prayer task force said in a statement.
Dobson said the April court decision will be appealed on grounds of the country's heritage. "Since the days of our Founding Fathers, the government has protected and encouraged public prayer and other expressions of dependence on the Almighty," she said.
In the meantime, the prayer groups and bible readings will continue today under the banner of federally sanctioned Day of Prayer.
At the U.S. Capitol in Washington, D.C., hundreds of faithful and dozens of lawmakers will gather -– and more will tune in live online -- for the conclusion of a 90-hour bible reading marathon on the west terrace.
"People from across America and across the world are surprised we have the right to do this, and we do," Terry Shaffer Hall, coordinator of the U.S. Capitol Bible Reading Marathon, said of the 21-year-old tradition. "What a better place to express freedom than this. We are Americans and behind us is the peoples' house."
ABC News' Luis Martinez contributed to this report.