When former President Donald J. Trump arrives for his arraignment Thursday in a federal courthouse in Washington, he shall be joined by a brand new lawyer, John F. Lauro.

Mr. Lauro, who has not represented Mr. Trump in his earlier two indictments, and Todd Blanche, who has, shall be on the protection desk within the courtroom, aides to Mr. Trump mentioned. Earlier within the day, Mr. Lauro filed a discover of look within the case.

He is becoming a member of Mr. Trump’s protection group strictly to concentrate on the indictment stemming from Mr. Trump’s efforts to stay in workplace after the 2020 election, aides mentioned. But he brings deep expertise with white-collar prison instances and a measured and unflappable nature, in response to individuals who have labored with him.

Christopher M. Kise — a member of the Trump authorized group who has labored with Mr. Lauro earlier than — described him as a “tenacious lawyer with an eye for critical details and masterful at cross-examination.” Mr. Kise, who’s engaged on different instances, mentioned the Trump group was “privileged to have him.”

Among Mr. Lauro’s highest-profile instances was a 2007 protection of Tim Donaghy, a former N.B.A. referee who pleaded responsible to betting on video games and taking payoffs from gamblers.

Mr. Blanche is representing Mr. Trump within the two different instances by which he has been indicted: the state case in Manhattan associated to hush cash funds to a porn star throughout the 2016 race, and the federal indictment in Miami accusing Mr. Trump of retaining reams of nationwide protection info after his presidency and obstructing the federal government’s efforts to retrieve the fabric.

Mr. Blanche, who went to regulation college whereas working as a paralegal within the United States Attorney’s Office for the Southern District of New York after which served as a prosecutor there for 9 years, has additionally represented different high-profile purchasers. They embody Igor Fruman, a former affiliate of Rudolph W. Giuliani, who labored for Mr. Trump throughout the 2020 election. Mr. Fruman pleaded responsible in a marketing campaign finance case and was linked to Mr. Giuliani’s efforts to seek out “dirt” in opposition to President Biden and his son Hunter.

Mr. Blanche additionally represented Paul Manafort, Mr. Trump’s marketing campaign chairman in 2016, in a profitable combat to get a New York case in opposition to him dismissed. Mr. Manafort had additionally been charged federally, and his legal professionals argued that it was primarily double jeopardy to cost him on the state degree, too. Mr. Manafort is amongst those that beneficial Mr. Blanche to Mr. Trump, an individual near the previous president mentioned.

Mr. Kise, who’s working with Mr. Blanche on the federal paperwork case, mentioned he has been “honored” to work with him and that he has “an exceptional legal mind and a compelling courtroom presence.”