Peggy Moore filed an intention to run Wednesday 
for Oakland’s at-large council seat.

Peggy Moore, one of the East Bay’s best and brightest political apparatchiks is poised to become highest-profile challenger yet for any of the five open seats on the Oakland City Council.

Moore, a member of Oakland Mayor Libby Schaaf’s office and campaign manager for her dominating campaign in 2014, filed papers Wednesday to challenge Councilmember Rebecca Kaplan for her at-large city council seat.

Few Democratic Party insiders in the East Bay have more impressive resume than Moore. In April, she was named the California state director for Hillary Clinton’s presidential campaign after serving the same post for President Barack Obama’s re-election in 2012. Moore previously served as the state field director for Organizing for America, the post-2008 campaign offshoot of Obama’s initial campaign for president.

Despite the clear successes in organizing, Moore’s own political aspirations have so far been incomplete. She lost a previous run for the Oakland City Council in District Two in 2005 and flirted briefly with entering the race for the open seat in the Assembly’s 15th District two years ago.

Kaplan, meanwhile, is one of Oakland’s most well-known public leaders and also one of its most battle-tested. Since 2010, Kaplan has run hard-fought campaigns every two years—unsuccessful mayoral races in 2010 and 2014, which she finished second, in addition, to her re-election to the at-large seat against former Councilmember Ignacio De La Fuente.

In the meantime, Kaplan has created a number of detractors, be it for her votes in favor of renters’ rights or perceptions her stances toward development and cannabis have changed. Moore’s potential candidacy appears fueled by political disagreements between Kaplan and Schaaf, Moore’s current boss.

Kaplan’s positions recently on housing in Oakland are also believed to be the impetus for Bruce Quan’s candidacy for the at-large seat. A political neophyte, Quan was a go-between the city and the Chinese investors who are helping finance the Brooklyn Basin development south of Jack London Square. He is not related to former Mayor Jean Quan, who was also rumored to have early interest in running against Kaplan.

Others who have filed intentions to run for the at-large seat are Matthew Hummel, the chair of the Oakland Cannabis Regulatory Commission; former mayoral and council candidate Nancy Sidebotham; and community activist Patricia Ellis.