Why is the Times striking so hard at Biden's age? But not once at Sanders, who is older?

The hammer is really out there in this patronizing and denigrating report, for example.

Kamala Harris Makes the Case That Joe Biden Should Pass That Torch to Her

Phooey.

What they - the other candidates to his left and writers of articles like this one - are really attacking is his position as a moderate, despised as such by the AOC/Bernie wing.

But is that the only reason why nobody making these attacks whines that Bernie is too old, past it, out of touch, blah blah blah?

Biden is 76; Sanders is 77.

I have said from the beginning that Joe B looks frail, looks old, looks like he might fall over.

Sanders, older, does not.

No more than 70 year old Warren or the Duce, 73.

That's a part of it, I think.

Of course, Mr. Biden is not the only candidate who would be over 70 on Election Day. 

But the others atop the field, Senators Bernie Sanders and Elizabeth Warren, have been at the vanguard of the party’s leftward tilt, sharpening their economic arguments to a fine point in recent years and making plain their urgency not just to remove and replace Mr. Trump but to address the root conditions that produced his election in the first place.

In a few important moments, Mr. Biden managed to jolt himself toward the future and outline a progressive agenda he would pursue as president. 

Having unveiled only a few signature proposals so far on the campaign trail, he pledged to take aggressive action to combat climate change, and to reinforce the middle class with new benefits like an optional government health care plan.

It remains to be seen, however, whether Democratic voters will embrace as an exciting vision a package of ideas that represent, in aggregate, much of the unfinished business of the Obama administration.

It remains to be seen? Isn't he already and still the front runner?