It has been called into question whether it’s true that Sen. Marco Rubio is responsible for the provision (inserted into last year’s annual spending bill and now again into this year’s) that requires the risk-corridor program in ObamaCare to be budget neutral. Like this year’s giant spending law, last year’s omnibus bill was the result of a leadership-driven process that drew on substantive expertise from the relevant committee staffs but did not much involve most members of either house. But Rubio was without question the first and most significant congressional voice on this subject, and if he hadn’t done the work he did, the risk-corridor neutralization provision would not have been in last year’s (or this year’s) budget bill.