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this is Shades of the Day — bringing you different shades of opinion in news and culture so that you can see the big picture quickly.

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It’s Saturday, June 29 — here’s what you’ll find in today’s newsletter:

• The debate over whether Biden should step down

• A new Alzheimer's drug

• 4 quick hits of news from the last 24 hours

Should Biden step down?

The WSJ: After a shaky debate performance against Trump, Democrats are discussing replacing Biden. Concerns about his age and ability to serve have reached a fever pitch.

The Atlantic says it's time: Biden should step down. His debate performance was a disaster and he looked too old.

A Financial Times Op agreed: Biden's gotta go. It's not too late to replace him -- the DNC can still recover.

But Kamala Harris shut down questions of a Biden replacement. She said that Biden might've lacked “style points” but has strong “substance”.

California governor Newsom also defiantly pushed back: Biden has a strong record, and Dems should back him.

NBC's take: Even if Dems chose to replace Biden, it wouldn't be easy. Party rules and delegate loyalty make it nearly impossible.

But a different Atlantic article says that's why Biden should step down willingly: If he really wants to save democracy, he needs to do right by the Democratic Party.

New Alzheimer’s drug

The Telegraph: The FDA approved a new Alzheimer's drug called donanemab -- it's amazing, and it's given patients their lives back by improving memory.

Axios questions its long term benefits -- it might just be a temporary fix.

Forbes: And the drug raises big concerns about equity and cost -- minorities were underrepresented in trials.

Wired thinks it looks promising, but it can only work if patients get diagnosed -- digital cognitive tests and AI could help with that.

Poll

1) Experiment shows bird flu in cows may be contained by addressing milking machine contamination.

2) The recent Biden-Trump debate has left many voters feeling uncertain and dismayed about their choices in the upcoming election.

3) Uvalde families react to the arrest of Pete Arredondo, calling for further action beyond his indictment.

4) NASA astronauts' return from ISS delayed as teams investigate Starliner's thruster malfunctions.