John Bolton meets with Belarus' president on August 29. Photo: Yuri Oreshkin\TASS via Getty Images

Former national security adviser John Bolton resigned the day after a Monday discussion about Iran policy in which President Trump raised the possibility of relieving some sanctions, a person close to Bolton tells Axios.

What happened: Bolton did not favor giving the Iranians relief and believed the maximum pressure campaign was working, the person, who spoke on condition of anonymity, said.

Background: Iranian President Hassan Rouhani "signaled approval" of Trump's dismissal of Bolton earlier this week, the AP reports. Rouhani reiterated that Iran is interested in negotiations with the U.S. only if suffocating economic sanctions are lifted, per Iran's semi-official Tasnim News Agency.

Go deeper: Inside Bolton's chaotic White House departure

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Trump, Biden strategies revealed in final ad push

Data: Bully Pulpit Interactive; Chart: Danielle Alberti/Axios

President Trump is pouring hundreds of thousands of dollars into Facebook ads on the Supreme Court and conservative judges in the final stretch of his campaign, while Joe Biden is spending over a million on voter mobilization, according to an analysis by Axios using data from Bully Pulpit Interactive.

The big picture: Trump's Facebook ad messaging has fluctuated dramatically in conjunction with the news cycle throughout his campaign, while Biden's messaging has been much more consistent, focusing primarily on health care and the economy.

How NASA and the Space Force might fare under Biden

Illustration: Eniola Odetunde/Axios

Joe Biden hasn't gone out of his way to talk about outer space during his presidential campaign. That could be bad news for NASA's exploration ambitions, but good news for the Space Force.

The big picture: NASA faces two threats with any new administration: policy whiplash and budget cuts. In a potential Biden administration, the space agency could get to stay the course on the policy front, while competing with other priorities on the spending side.

48 mins ago - Health

Axios-Ipsos poll: Federal response has only gotten worse

Data: Axios/Ipsos poll; Note ±3.3% margin of error for the total sample size; Chart: Andrew Witherspoon/Axios

Americans believe the federal government's handling of the pandemic has gotten significantly worse over time, according to the latest installment of the Axios/Ipsos Coronavirus Index.

Why it matters: Every other institution measured in Week 29 of our national poll — from state and local governments to people's own employers and area businesses — won positive marks for improving their responses since those panicked early days in March and April.

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