
[L]ast week, Sen. Bernie Sanders sent his supporters a message saying, โif I am the best candidate to beat Donald Trump, then I will probably run.โ
Sanders asked for $3 contributions, complained about opposition already being organized against him, and claimed that he was the one who has โthe agenda the American people want,โ and the one that can win.
Sounds like heโs running.
But on the last day of the old year, Sanders got one-upped. Sen. Elizabeth Warren, of next-door Massachusetts, announced that she was running.
Warren, by something close to common political consent, is Sanders main competitor for the support of the Democratic Partyโs โprogressiveโ wing, as opposed to its โestablishment.โ Whether this distinction is meaningful โ whether the two factions differ over policy or merely over temperament โ is open to question.
But thatโs a discussion for another day. For now, what is important is that if Sanders runs the two of them will be battling from the outset for the same slice of the Democratic primary/caucus electorate.
Each has advantages. Sanders has a committed following from his challenge to Hillary Clinton. He has money and the ability to raise more. He can reassemble much of the organization that helped him come close to the nomination in 2016. Heโs better known than Warren.
Her advantages are that sheโs a woman running when Democratic women are energized, feeling flush about electing so many women to Congress last year. She comes across as calmer than Sanders.

And come November 3, 2020, Election Day, she will be 71 years old.
Thatโs older than most presidents are when they first win office. But itโs seven years younger than Sanders, a reality that could and perhaps should be a factor in this yearโs campaign.
Thatโs because for the first time, three people in their late 70s — Sanders, former Vice President Joe Biden and former New York Mayor Michael Bloomberg — are on the verge of mounting credible campaigns for president. If any of them gets elected next year, he will turn 80 before his first term ends. That may be too old.
No president has been 80. Most presidents have been in their 50s or 60s when they left office. George Washington was 65. Grant was 54. Teddy Roosevelt was 50, and Dwight Eisenhower, the oldest until Ronald Reagan, was 70. Barack Obama was 55.
Reagan left office a couple of weeks before his 78th birthday. Five years later, he announced that he had been diagnosed with Alzheimerโs Disease. He was then 83. Thatโs how old Sanders will be when the next presidential term ends. Biden will be 82.
This is a delicate and difficult subject, but unavoidable. Neither Biden nor Sanders is likely to be afflicted by dementia over the next four years. But people of their age (full disclosure: that includes me) are notably more likely to suffer from it than are people in their 50s and 60s.
The correlation between age and dementia is irrefutable. Different studies reach different conclusions. But one Italian survey found that 13.7 percent of people in their 80s had a form of dementia. Alzheimerโs researchers in Britain concluded that โa personโs risk of developing dementia rises from one in 14 over the age of 65 to one in six over the age of 80.โ
No one should doubt that the comparatively youthful Donald Trump (heโll be 74 on election day) will remind voters that if they choose one of these older gentlemen they are taking the risk that they will have a demented president in a few years.
Irresponsible? Outrageous? Maybe. But not conclusively incorrect. And certainly not beneath the dignity of todayโs Republican Party.
All this creates a dilemma for Democrats, both party leaders and rank-and-file voters. Right now, Sanders, Biden, and Bloomberg appear hale and healthy. By all indications, their minds are as sharp as ever they were. As people live longer โ and many of them stay fit longer โ the whole country has been bombarded by slogans about how 50 is the new 35, 65 is the new 40, 70 is the new 50, or whatever.
There is something to that, what with more people trying to eat healthy diets, hitting the gym and following โ sometimes almost worshipping โ various exercise regimens. Sanders and Biden have loyal followings (if Bloomberg does, itโs not visible), who might be expected to argue that it is unfair to these candidates even to mention their age.
Suppose Democratic nominee Sanders caught a cold two weeks before the election. Or stumbled. Social media would have him at deathโs door and maniacal within the hour. Thatโs what happened to a mildly ill Hillary Clinton in 2016.
Yes, a 45-year-old candidate can catch cold or stumble, too. But it wouldnโt be as damaging.
None of this ends the Sanders campaign before it starts. It is a factor he will have to deal with, not the one that breaks the deal. But it wonโt go away by itself.
