we start our coverage with abc's mary bruce right in washington. hi, mary. >> hi, paula, good morning. this is a potential game changer in this roller coaster campaign, donald trump getting his first major endorsement from a card carrying member of the republican establishment just as he heads into super tuesday. his former rival showed up unannounced and dropped a bombshell on donald trump's campaign. president in donald trump. >> reporter: chris christie is lending his credibility to trump's runaway campaign. >> i can guarantee you that the one person that hillary and bill clinton do not want to see on that stage come next september is donald trump. >> reporter: they weren't always so friendly. >> we'll do it. i'll get it done because i make deals and i get deals and i'm doing deals. >> reporter: united christie and trump are taking aim at a common enemy, marco rubio. >> desperate people in campaigns flail pumps in the last days of a losing campaign. >> reporter: after rubio let trump have it. >> if he hadn't inherited $200 million he would be se
. >> from newschanel 8 thi this ia good morning washington update. >> anchor: good morning.
top scientists will take on the zika virus here in washington. members of the packed mesof science, engineering and medicine will discuss research that could be implemented to help minimize the spread of the virus in u.s. and discuss (elephant sound) there's a big difference between making noise, (tapping sound) and making sense.
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