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Illustration: Lazaro Gamio/Axios

Twitter's plan to allow users to control who can reply to their posts, announced Wednesday, is largely welcome news for those who are routinely harassed on the service — including many people of color, women, LGBTQ+ folks and other groups often targeted by online mobs.

Why it matters: It could create an even riper environment for misinformation — especially when combined with Twitter's policy of allowing elected officials' tweets to stand, even when they violate the rules that apply to other users.

  • There are already concerns that the service gives politicians' speech special protections compared to regular users. Now the company would seem to be making it easier for them to screen out dissenting voices.

Driving the news:

  • Twitter on Wednesday announced it will let users decide who can comment on their tweets: all users, those who the user follows, just the people who are mentioned or no one at all.
  • The new feature is being tested now, but Twitter told Axios it plans to eventually give all users the option, including elected officials.
  • Twitter noted that users will still be able to "quote tweet" posts that have replies limited — meaning create a new post quoting the tweet in question. Also, per The Verge, Twitter said it will be watching the effect of the new rules on the spread of misinformation.

When it comes to politicians specifically, Twitter notes the policy announced last year that it may flag and limit promotion of tweets that violate its rules — or even take them down if they are found not to be in the public interest.

  • It's worth noting, though, that the company said it expects to use those options rarely — and Twitter has yet to flag any politician's tweets in this manner.

Between the lines: Even if this new reply option is a generally good thing, and even if it makes sense to allow politicians' rule-breaking tweets to remain, the combination of the two policies could be especially dangerous. In theory, it allows a politician to post knowingly false information to a wide audience and also limit who can directly respond with contrary evidence and arguments.

Yes, but: Some see signs that even though President Trump has a record of using Twitter to spark crises, the service had a de-escalating effect in this week's U.S. confrontation with Iran.

  • Wired's Garrett Graff, pointing to the way both Iranian officials and Trump used Twitter in real time Tuesday night to send messages, notes that "world leaders can communicate more quickly and directly than ever in times of crisis."

Our thought bubble: History suggests crisis diplomacy is better pursued in private, by professionals. Maybe next time, Trump and his foreign counterparts could at least exchange DMs instead?

Go deeper:

Go deeper

Pakistan PM will "absolutely not" allow CIA to use bases for Afghanistan operations

Pakistan will "absolutely not" allow the U.S. Central Intelligence Agency to use bases on its soil for cross-border counterterrorism missions after American forces withdraw from Afghanistan, Prime Minister Imran Khan tells "Axios on HBO" in a wide-ranging interview airing Sunday at 6 pm ET.

Why it matters: The quality of counterterrorism and intelligence capabilities in Afghanistan is a critical question facing the Biden administration as U.S. forces move closer to total withdrawal by Sept. 11.

4 hours ago - World

U.S. wants nuclear deal done before Iran's new president takes power

Iranian negotiatorAbbas Araghchi arrives at the Grand Hotel Wien for the nuclear talks. Photo: Joe Klamar/AFP via Getty Images

The Biden administration wants to finalize a deal with Iran to return to the 2015 nuclear deal in the six weeks remaining before a new Iranian president is inaugurated, a U.S. official tells Axios.

Key quote: The official said it would be "concerning" if talks dragged on into early August, when Iran's transition is due to take place. "If we don't have a deal before a new government is formed, I think that would raise serious questions about how achievable it's going to be," the official said.