Former Mexico City mayor breaks with leftist PRD, criticizes its closeness to ruling party

Former Mexico City Mayor Marcelo Ebrard is splitting with the country's leftist Democratic Revolution Party, or PRD.

Ebrard writes in a letter of resignation that he disagrees with party leadership's increasing closeness to President Enrique Pena Nieto and the governing Institutional Revolutionary Party.

He says he was a member of the PRD for 10 years but its current direction "is incompatible with the objectives and political duties of the Mexican left."

Ebrard joins a string of other prominent figures to part ways with the PRD. He has clashed with an ascendant faction known as the New Left, and last week was denied a party nomination for legislative elections in June.

Ebrard tweeted a photo of his resignation letter Friday. He was the capital's mayor from 2006 to 2012.