Jeffrey A. Singer - A senior fellow at the Cato institute, a republican think tank that receives much of its funding from large republican donors/foundations and corporate donors. I don't know how to sum up the Cato Institute in 2 sentences unfortunately, but their wikipedia says plenty [0].
Josh Bloom - The Director of Chemical and Pharmaceutical Sciences The American Council on Science and Health, which is a pro industry advocacy group [1] that has received large amounts of money from the agriculture, petroleum, tobacco and pharmaceutical industries as per leaked funding documents in 2012 [2].
[0] https://en.wikipedia.org/wiki/Cato_Institute
[1] https://en.wikipedia.org/wiki/American_Council_on_Science_an...
[2] https://usrtk.org/industry-pr/american-council-on-science-an...