Senator Dianne Feinstein (D-Calif.) announced on Monday that she will seek re-election in 2018, ending months of speculation over whether she would seek another term.

“I’m immensely proud of my service in the Senate and all I’ve done to help the people of California and the nation,” Feinstein announced on social media. “But there’s still so much work left to do, from ending gun violence, to combating climate change, to ensuring proper and affordable access to healthcare, and to giving DREAMers the chance to stay in the United States.”

Feinstein has served on the Senate since 1992, when she won a special election to replace Pete Wilson, who resigned to become governor.

In 2017, Feinstein became the top Democrat on the Senate Judiciary Committee – the first woman to assume that role – where she helps shape policy on criminal law, national security, immigration, civil rights and the courts. She also oversees judicial nominations and major investigations including Russia’s interference in the 2016 election.

A native of San Francisco, Feinstein served for nine years as a San Francisco County Supervisor, starting in 1969. She became mayor of San Francisco in 1978 following the assassination of Mayor George Moscone and Supervisor Harvey Milk.

The following year she was elected to the first of two four-year terms. As mayor, Feinstein managed the city’s finances with a firm hand, balancing nine budgets in a row. In 1987, City and State Magazine named her the nation’s “Most Effective Mayor.”