TOPEKA, Kan. (AP) — President Barack Obama is sending Congress a budget proposal that includes $714 million for construction of a new biosecurity lab at Kansas State University. That would be the largest proposed federal expenditure for the project to date. Senator Pat Roberts of Kansas says Wednesday that the recommendation signals the administration's support for building the $1.15 billion lab, which will study large animal diseases and develop measures to protect the nation's food supply. The Department of Homeland Security will build the lab to replace a facility at Plum Island, New York. Roberts, a Republican, says the proposal will require additional financial commitments from Kansas, which will be worked out by Governor Sam Brownback and legislators. DHS recently awarded a $40 million contract to begin construction of a utilities plant to support NBAF.