The U.S. Senate's leading proponent for increasing the H-1B visa cap is Sen. Orrin Hatch (R-Utah). His previous legislative efforts have infuriated critics of the visa program. Hatch's 2015 visa cap-increasing bill, I-Squared, was so awful, said the IEEE-USA, that it would "help destroy" the U.S. tech workforce.
Hatch is updating his I-Squared bill with reforms he hopes buy leeway with his critics. That doesn't seem likely.