Jeff Weaver will not serve a second stint as campaign head if Sen. Bernie Sanders, I-Vt., runs for president in 2020, according to a report published Wednesday.

Weaver chose to step down from that role and plans to take over as senior strategic adviser if Sanders makes another run at president, CNN reported.

Sanders, 77, will make a decision in the coming months on whether to seek the Democratic nomination for president in what is expected to be a crowded pool of candidates challenging President Trump. Sanders unsuccessfully challenged Hillary Clinton for the 2016 Democratic nomination. But he won a series of key states and primaries, including Michigan, which exposed her weaknesses as a candidate on the road to a November loss against Trump.

Weaver's move comes amid allegations of sexual harassment by fellow members of Sanders' 2016 campaign. The report stated Weaver's job title change was made prior to when the sexual misconduct charges emerged.

Weaver suggested he planned all along not to return to the campaign chief of staff role.

"It was never my intention to run a subsequent campaign if there is one," Weaver said. "I think if you look at presidential campaign managers, the number of people who have run multiple campaigns is very few. I think I can be most helpful to Bernie, if he runs, being a strategic adviser that needs to deal with some of the 30,000-foot issues as opposed to the management of a day-to-day campaign."

His successor would be in charge of overseeing a "more robust" campaign with a "much bigger leadership team" than in 2016, according to Weaver.

"It would have to be much more diverse than was the case in 2016, when it was too male and too white," he said.