As Republican presidential candidate Rick Santorum surges in the polls he's sharpening his attacks against President Obama.
The former Pennsylvania senator is calling Obama out for what he views as the president's "phony ideals, some phony theology, not a theology based on the Bible, a different theology."
Over the weekend, Santorum criticized the president specifically for putting the environment ahead of what he calls human needs.
"The president of the United States is exercising his values and trumping the values of the Church," Santorum charged.
The Obama campaign is now lashing back, calling the Santorum remarks "over the line."
"It's wrong; it's destructive," former White House Press Secretary Robert Gibbs charged. "It makes it virtually impossible to solve the problems that we all face together as Americans."
The Santorum campaign is also hitting hard on the recent debate over whether Catholic institutions must provide contraception insurance coverage.
Speaking at a Georgia church Sunday night, Santorum said the president's compromise plan to require insurance companies to pay for contraception is no accommodation.
"It is saying that the government knows better," Santorum said. "It is imposing his ideology on a group of people expressing their theology, their moral code."
In all this debate Santorum has taken care to point out that he's not challenging whether the president is a Christian. He said he believes he is a man of faith.
But the back-and-forth between the campaigns right now shows just how seriously the president is taking Santorum.