Sen. Dianne Feinstein, the oldest U.S. senator, says she's running for re-election.
The California Democrat said on Twitter that there's "lots more to do," like fighting gun violence, combating climate change and boosting access to health care.?
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Feinstein is 84, but said "I'm all in." She would be running for her fifth full term.
On Sunday, Feinstein told NBC's "Meet the Press" that "I'm ready for a good fight. I've got things to fight for."
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Feinstein, who had a pacemaker implanted in January, joined the Senate in 1992 after winning a special election.
She has been a leading advocate for gun control over her tenure.
AP
Sen. Dianne Feinstein, D-Calif., speaks to reporters as she arrives at the Capitol in Washington, Tuesday, Sept. 19, 2017. (AP Photo/J. Scott Applewhite)