In a letter to Nancy Pelosi this afternoon, Minority Leader John Boehner called on the Speaker to conduct a roll call vote,

With this in mind, I request that you use your discretion under the Rules of the HOuse of Representatives, Clause 2 and 3 of House rule XX, to conduct the record vote by call of the roll for both adoption of the Senate health care bill (i.e. the Senate Amendment to H.R. 3590, as passed on Christmas Eve this past year) and for the rule making that bill in order.