You are assuming a lot about supposed evidence nobody has said anything specific about. One shouldn't also assume people in Congress know how to evaluate any evidence. Nor justices, based on the questions they asked.
Congress members speak of space lasers and weather control... I'm not sure they're competent as a whole. Actually, it reminds me of the Russian guy that always spouts nonsense about nuking UK into oblivion, and that theory that he's just kept around to make the real evil people look sane.
As a matter of political science and public choice theory, the legislature is the branch of government most trusted to collect information and make these kinds of deliberations.