But Mr. Cooper gave the impression to be working to vary minds. He wrote in his opinion piece that within the quick time for the reason that vote, authorized consultants’ understanding of the problem had developed and “exposed the serious weakness of Mr. Paul’s analysis.”
“The senators who supported Mr. Paul’s motion,” he wrote, “should reconsider their view and judge the former president’s misconduct on the merits.”
The query of constitutionality might come to a head rapidly when the trial opens on Tuesday. Though Senate leaders had been nonetheless debating the exact construction of the trial, prosecutors and Mr. Trump’s protection staff had been getting ready for the chance that Mr. Paul or one other senator might pressure a second vote on the query on the opening day, earlier than both facet will get into their full shows.
Mr. Cooper has a deep and lengthy historical past within the conservative authorized motion. He grew up in Alabama, and regardless of not attending an Ivy League legislation faculty, landed a clerkship for Justice William H. Rehnquist in 1978 earlier than he turned the chief justice, and at a time when Justice Rehnquist was thought of probably the most conservative member of the courtroom.
Mr. Cooper went on to turn into the top of the Justice Department’s Office of Legal Counsel in the course of the Reagan administration, writing a number of extremely conservative and controversial interpretations of the legislation, together with one about whether or not employers might decline to rent somebody who might have AIDS.
As a personal lawyer, he has defended points like faculty prayer and was an energetic member within the Federalist Society. In 2010, when the Republican National Lawyers Association named him the Republican lawyer of the 12 months, there have been three audio system for Mr. Cooper: Mr. Bolton; the top of the N.R.A., Wayne LaPierre; and Ed Meese, an lawyer common below Ronald Reagan who was thought of among the many most conservative within the division’s historical past.
In the early days of the Trump administration, Mr. Cooper — who’s longtime buddies with Mr. Sessions — was thought of to be the solicitor common. But Mr. Cooper remained in personal observe, turning into the lawyer for Mr. Sessions as he was enmeshed in controversy associated to the Russia investigation. In the second half of the Trump presidency, Mr. Cooper represented Mr. Bolton and his deputy, Charles Kupperman, within the first impeachment trial of Mr. Trump.
Mr. Cooper has continued to characterize Mr. Bolton because the Justice Department has sued him to recoup cash he constructed from a damning ebook he printed about Mr. Trump.
Nicholas Fandos contributed reporting.