LAKE FOREST, CALIF. ? Potential presidential candidate Barack Obama stood before one of the country’s largest evangelical churches Friday for a frank discussion of sexuality and spirituality that included the declaration that condoms should be made more widely available to fight AIDS.

The Democratic senator’s appearance at the Saddleback megachurch was a source of dispute among evangelical leaders, with some of the most conservative saying that a politician who supports abortion rights should not have been allowed to speak at such a prominent church.

Obama urged unity despite political differences to fight the disease that has killed 25 million people since the first case was reported in 1981. Some 40 million currently are infected with HIV, the virus that causes AIDS.

“We are all sick because of AIDS,” Obama said. “We are all challenged by this crisis.”

In a show of political unity, Obama took an AIDS test with a potential White House rival on the Republican side – Sen. Sam Brownback, of Kansas. Brownback draws his support from the conservative evangelical community, but Obama has been urging liberals not to allow Republicans to claim itself the party of Christians.

After addressing Brownback as his friend and applauding his efforts on issues such as AIDS, Obama said: “There is one thing I’ve got to say, Sam, though: This is my house too. This is God’s house. So I just want to be clear.”

Sen. Sam Brownback, R-Kan., takes an HIV test Friday at the 2006 Global Summit on AIDS and the Church conference at the Saddleback Church in Lake Forest, Calif.

In another show of bipartisanship, the Illinois senator said President Bush doesn’t get enough credit for committing $15 million against HIV and AIDS over five years.

He called the dispute over condoms a “false argument.”

“I also believe we can’t ignore the fact that abstinence and fidelity, although the ideal, may not always be the reality, that we’re dealing with flesh and blood men and women and not abstractions, and that if condoms and potentially things like microbicides can prevent millions of deaths, then they should be made more widely available,” Obama said. “That’s my belief.”

He said men and women often are “contracting HIV because sex was no longer part of a sacred covenant, but a mechanical physical act.” He said government programs cannot solve that problem, but churches can make a real difference by providing people with a moral framework to make better choices.