new york/washington former u.s. attorney debra wong yang consider chair securities exchange commission trump administration source familiar situation say tuesday yang partner gibson dunn crutcher los angeles represent corporate defendants white-collar crime investigations compliance matter previously yang serve first female asian-american u.s. attorney appoint central district california republican president george w. bush 2002 leave 2006 join gibson dunn yang longtime friend republican new jersey governor chris christie donate presidential campaign tap would become second consecutive former federal prosecutor lead sec current chair mary jo white previously serve u.s. attorney southern district new york yang respond call email request comment clear lead contender top sec job name float around include former sec commissioner paul atkins help oversee transition financial regulation ralph ferrara former sec general counsel also transition team unlike atkins ferrara yang consider deeply steep securities regulatory policy matter yang represent variety corporate clients also previously serve justice department-appointed monitor medical device company currently represent allergan plc lawsuit file last month company call amazon medica trademark infringement false advertise unfair competition relate sell botox foreign label u.s. doctor also represent uber technologies inc class action lawsuit force company pay drivers overtime minimum wage yang among gibson dunn attorneys hire conduct outside investigation bridgegate scandal march 2014 report exonerate christie find involvement decision close lanes george washington bridge link new jersey new york city two christie former close associate bridget kelly deputy chief staff bill baroni former deputy executive director port authority new york new jersey convict roles scandal last month trial former port authority official david wildstein previously plead guilty involvement testify baroni fact discuss lane closure christie christie charge wrongdoing defense attorneys case local media new jersey raise question independence gibson dunn investigation cite yang personal friendship christie efforts raise money campaign ex-u.s. attorney yang consider sec chair source