When Congress also demands "information from universities, companies and trade groups about funding for scientists who publicly [accept or] dispute widely held views on the causes and risks of climate change," then I'll care about what "prominent members of the U.S. House of Representatives and the Senate" think about climate change.
It's not like members of Congress understand the "research or testimony" anyways. Nor do members of Congress care what others have to say; they use testimony as an opportunity for themselves to give speeches disguised as questions.