Dianne Feinstein (D-CA) is running for re-election in 2018 at the age 85.

[nkpolitics1212]

Here is a list of US Senators who were over 85 years old when they ran for re-election and won.
Strom Thurmond (R-SC) 87 years old in 1990,93 years old in 1996. served 48 years in the US Senate.
Robert Byrd (D-WV) 89 years old in 2006. Served 51.5 years in the US Senate.
Daniel Inouye (D-HI) 86 years old in 2010 Served 50 years in the US Senate.
Unlike Thurmond,Byrd,and Inouye-Feinstein will not get a chance to be Senate President Pro Tempore.
Feinstein is the 2nd most senior Democratic US Senator after Pat Leahy (D-VT). In order for Feinstein to be US Senate President Pro Tempore, Democrats will have to regain control of the US Senate by 2022 and Leahy will have to retire in 2022.
Pat Leahy (D-VT) could be the longest serving US Senator. He wins re-election to a 9th term in 2022 at the age 82, 10th term in 2028 at the age 88, and 11th term in 2034 at the age 94.

[RandySF]

1. Bernie will be 81 in 2022.

[pbmus]

2. Whatever your point, your post highlights the need for term limits.

[Baconator]

3. You'll never get term limits...

... but it's possible to gain more voters if they feel that their representatives might have to live with the consequences of their actions.

[Caliman73]

4. Term limits are a panacea.

They sound like a good idea but the reality is that they just bring new lambs to the slaughter and get rid of institutional memory. The problem isn't that people are in office too long. The problem is money in politics. With term limits you lose seasoned leaders but who stays around in Washington or State capitols? The lobbyists, and the staffers, who end up having out sized influence, especially over new and inexperienced politicians coming in.

Elections are natural term limits. The problem is that American voters are usually apathetic and/or ignorant. There are problems with the advantages that incumbency brings, but mainly it is the money and lobby strength that makes incumbency so difficult to get around.

[Caliman73]

5. Age is usually not a determining factor.

Feinstein has been a decent Senator for California. I am not particularly a fan of her flirtations with authoritarianism. In my humble opinion, she has been a bit too fond of allowing the government to tap phones and gather information on us during her tenure. Given what she has seen and experienced in her life, I can understand the tendency, but as I said, not the biggest fan.

That said, in California, with open primaries, we will likely see two Democratic nominees for Feinstein's seat if anyone other than Feinstein runs on the Democratic side. We had to Dems run for Barbara Boxer's old seat but that was a vacant seat. We had conservative Democratic politician Loretta Sanchez against Kamala Harris. We will have to see if another Dem challenges Diane. I would prefer to have a choice between two Democratic contenders but obviously if Feinstein is the Democratic candidate, she will have my vote over any one else.

[Madam45for2923]

6. Feinstein & Pelosi FTW!!!