Boris Epshteyn has risen to the role of top “legal” adviser “He’s a killer”. He also seems to be corrupt. Shocking, I know: Boris Epshteyn has had his phone seized by federal agents investigating former President Donald J. Trump’s efforts to remain in power after his election loss. Lacking any track record as a political strategist, he has made more than $1.1 million in the past two years for providing advice to the campaigns of Republican candidates, many of whom believed he could be a conduit to Mr. Trump. A cryptocurrency fund with which he is involved has drawn scrutiny from federal prosecutors. And he has twice been arrested over personal altercations, leading in one case to an agreement to attend anger management classes and in another to a guilty plea for disorderly conduct. As the former president faces escalating legal peril in the midst of another run for the White House, Mr. Epshteyn, people who deal with him say, mirrors in many ways Mr. Trump’s defining traits: combative, obsessed with loyalty, transactional, entangled in investigations and eager to make money from his position. Mr. Epshteyn is the latest aide to try to live up to Mr. Trump’s desire for a slashing defender in the mold of his first lawyer protector, Roy M. Cohn. He serves as a top adviser and self-described in-house counsel for Mr. Trump, at a time when the former president has a growing cast of outside lawyers representing him in a slew of investigations and court cases. A…