washington u.s. senate tuesday clear way approval 1.1 billion immediate fund battle zika virus link birth defect well legislation pending house representatives vote 68-29 senators limit debate measure pave way likely senate approval week two fund approach fail get enough support advance senate meanwhile white house threaten veto 622.1 million zika bill poise pass house representatives late week say woefully inadequate unlike senate legislation house bill also require 622.1 million fully offset spend cut elsewhere many conservative republicans house refuse approve zika fund would add federal budget deficits democrats senate republicans favor treat problem emergency would finance spend cut republican senator roy blunt missouri tell reporters senate measure trim package back obama request really address emergency time democratic senator patty murray washington craft legislation blunt add go need keep pressure house republicans set aside partisan bill actually get administration emergency resources need unclear long might take senate house work differences pass respective bill u.s. health officials conclude zika infections pregnant women cause microcephaly birth defect mark small head size lead severe developmental problems baby world health organization say strong scientific consensus zika also cause guillain-barre rare neurological syndrome cause temporary paralysis adults last year brazil begin detect increase microcephaly virus spread rapidly americas new case report warm climates southern u.s. state include florida house republicans argue 622.1 million bill couple 589 million obama administration already shift zika unused fund battle ebola would provide enough money sept. 30 end fiscal year administration say need emergency fund help state local governments eradicate mosquitoes spread virus develop vaccine version story correct say 622.1 million 622.1 billion 3rd 11th paragraph u.s. senate set approve 1.1 billion zika virus fund