The Senate's top Democrat said yesterday he is still dedicated to spending valuable floor time this year on comprehensive climate and energy legislation, but the three sponsors of the plan may have to go member-by-member in order to deliver a package capable of mustering 60 votes. Majority Leader Harry Reid (D-Nev.) said he wants to bring the bill from Sens. John Kerry (D-Mass.), Lindsey Graham (R-S.C.) and Joe Lieberman (I-Conn.) to the floor later this spring or summer.