At time, Lewis wrote in a memo to staff that the changes to the opinion section were not about "siding with any political party."
"This is about being crystal clear about what we stand for as a newspaper," he said. "Doing this is a critical part of serving as a premier news publication across America and for all Americans."
A 2007 Pulitzer Prize finalist in commentary, Marcus last month wrote an opinion column with the headline, "Trump 2.0: The most damaging first two weeks in presidential history."