Ukraine's President Volodymyr Zelensky issued a statement on his Facebook page Saturday stating that it "is never and under no circumstances acceptable to interfere with another country's sovereign elections."

Why it matters: National Counterintelligence and Security Center Director William Evanina said Friday the Russian government had taken action to "denigrate former Vice President Biden" before November's election and that a "pro-Russia" Ukrainian lawmaker was "spreading claims about corruption" to "undermine" the presumptive Democratic presidential nominee.

Postmaster General Louis DeJoy announced a reorganization of the U.S. Postal Service's leadership on Friday, shifting top personnel and pushing structural changes, according to the Washington Post.

Why it matters: The restructure, which reassigns or displaces postal executives, including two officials who oversee day-to-day operations, comes amid increased scrutiny from Democratic lawmakers, who fear that DeJoy's changes could threaten the use of mail-in ballots for the November election.

Sen. Elizabeth Warren and Hillary Clinton both are slated to speak on the Wednesday of the Democratic convention — Aug. 19 — four sources familiar with the planning told Axios.

Why it matters: That's the same night Joe Biden's running mate (to be revealed next week) will address the nation. Clinton and Warren represent two of the most influential wise-women of Democratic politics with the potential to turn out millions of establishment and progressive voters in November.

National Counterintelligence and Security Center Director William Evanina said Friday that the Russian government is "using a range of measures" to "denigrate former Vice President Biden" before the November election.

Why it matters: Evanina warned that some Kremlin-linked actors are trying to support President Trump’s candidacy on social media and Russian television, while others are spreading false claims about corruption to undermine Biden and the Democratic Party.

Anthony Fauci declined to tell the Washington Post on Friday if mail-in voting should be used as a public health measure amid the coronavirus pandemic, saying his statement would "almost certainly ... be used as a soundbite."

Why it matters: Fauci said he didn't want the media to set up another confrontation between him and President Trump, but it highlights how government medical experts have often found themselves in politically contentious situations when dealing with issues like reopening schools, mask mandates or the upcoming election.

Looking ahead to Joe Biden's announcement of a female running mate, a group of women leaders sent a letter Friday to top news executives to warn them against "stereotypes and tropes" in coverage.

What they're saying: "Our country — and your newsrooms — have learned a lot since the killing of George Floyd and the subsequent protests for racial equality that his death spurred," the letter says.

After two gaffes and a low blow from President Trump questioning his faith, Joe Biden spent Thursday evening off his own message — clarifying comments and responding to attacks.

Why it matters: Biden’s responses reflect what we could see a lot more of in the next few months — cringeworthy comments and Trump smears, smacking into each other and pulling the Democrat off course.

The coronavirus has sent overall U.S. unemployment into the double digits — but it's a sort of full-employment act for election law attorneys.

The big picture: The prospect of extended court fights over COVID-19-related voting changes, an absentee ballot avalanche, foreign interference and contested presidential results has prompted a hire-all-the-lawyers binge by candidates and campaigns — not just in swing states but around the country.

The three biggest anti-Joe Biden storylines in right-wing media over the last year have either fizzled or are getting less online traction than they used to, according to data from NewsWhip provided exclusively to Axios.

Why it matters: This dynamic has rendered a formidable media ecosystem less effective in boosting President Trump as we move into the heart of the 2020 campaign.

Joe Biden explained on Twitter Thursday night what he "meant" by earlier comments suggesting that "the African American community is a monolith."

What they're saying: "Unlike the African American community, with notable exceptions, the Latino community is an incredibly diverse community with incredibly different attitudes about different things," Biden remarked in an interview hosted by the National Association of Hispanic Journalists and the National Association for Black Journalists, Politico reports.