The best Republican from a deep Blue State with a 'D' in front of her name has a real chance of losing her re-election bid.

A new poll found just 41 percent of likely California voters back the 84-year-old, five-term incumbent in her bid for re-election, six months before the 2018 primary.
The poll, released Wednesday by the UC Berkeley Institute of Governmental Studies, put Feinstein still comfortably ahead of her closest rival, state Senate leader Kevin de León, who received support from 27 percent of voters. Nearly a third of respondents, 32 percent, said they were undecided.
But for Feinstein, a virtual shoo-in in her previous re-election bids, dropping below 50 percent “shows weakness and vulnerability, much more so than in any of her past re-election campaigns,” said Mark DiCamillo, the head of the IGS poll.
A surprisingly high number of voters also say they have a negative impression of Feinstein — 42 percent, compared to 45 percent who think of her positively.

De Leon has a long ways to go to catch her, but he has two things going for him.
1) He's virtually unknown. As voters get familiar with him his numbers will go up.
2) The polls are moving in his direction.
Six weeks ago he was 27 points behind. This poll has him 14 points behind.

I'm not excited about de Leon. He's a mild mainstream Dem, the kind that DKos loves, but Feinstein is just plain awful.
Also, Feinstein already has the support of California junior Sen. Kamala Harris and House Minority Leader Nancy Pelosi. Which is proof that she needs to go.