Didn’t the bill get 2/3 in the Senate?
I guess some people who voted for it are opposing override then. Lobbied by Herbert?
http://www.sltrib.com/sltrib/politics/56160762-90/bill-carry-concealed-herbert.html.csp
This article says GOP Senator John Valentine became the 10th (out of 29) Senator to oppose override. The exact procedure is unclear to me. Apparently 2/3 of each House has to indicate they support override to call an “override session” to formally vote on it.