The controversy stemmed from the conflict between two bills in the House and Senate. Barton introduced the National Institutes of Health Reform Act of 2006, while Senator Rick Santorum introduced the Autism bill. Santorum said in a CNN interview that the Senate bill was intended to be "fit into" Barton's bill in the House bill. He stated that "I was in constant conversation with him and many House members all last week in an attempt to help the NIH bill come through the Senate, as well as try to move the Combating Autism bill through the Senate." Santorum stated that the Senate bill would investigate possible environmental causes, while the House bill would prevent that.