Richard L. Berke, the executive editor of Politico, has resigned from his position, he said in an email to his staff on Sunday, citing a disagreement over strategy with the organization’s founders, John F. Harris and Jim VandeHei.

Mr. Berke, who had been an assistant managing editor at The New York Times, joined Politico in October, less than a year ago.

“While our overarching goals are similar, Jim, John and I have agreed to disagree over the strategy for achieving those goals,” he wrote. “There is no acrimony and no drama — simply an acceptance by the three of us that the dynamics were just not there for us to function seamlessly.”

Mr. Berke’s resignation was effective immediately. The announcement appeared to have taken Politico’s staff by surprise, with one of them using the word “shocked” to describe the news.