Photo: David T. Foster III/Pool/Getty Images

Mike Pence's guest list for Wednesday's vice presidential debate in Salt Lake City will include the parents of murdered ISIS hostage Kayla Mueller, two senior administration officials with direct knowledge tell Axios.

Why it matters: The decision sheds light on Pence's strategy to target Joe Biden. Mueller's parents, Carl and Marsha, gave perhaps the most heart-wrenching speech of the Republican National Convention. But their remarks were also politically brutal, with Carl Mueller directly blaming the Obama-Biden administration for hiding behind policy and failing to save his daughter's life.

  • The Muellers praised President Trump for authorizing the mission to kill ISIS leader Abu Bakr al-Baghdadi — a mission named to honor Kayla — and Carl even went so far as to say he thought "if Donald Trump had been president when Kayla was captured, she would be here today."

Flashback: A Washington Post deep dive reported in 2015 that some who worked on the rescue mission believed that the White House was at least partly to blame for the failure to bring Mueller back, alleging delays in presenting the plan to Obama.

  • But multiple White House and Pentagon officials, including former national security adviser Susan Rice, told the Post that the process went as fast as it could possibly go given the operation's complexity, and that the hostages may have been moved just days prior to the mission.
  • “I understand the frustrations of folks who are working their hearts out, removed from what goes on in the Pentagon, in the White House, in the State Department. I get that," one official reportedly told the Post. "I think it is heart-breaking that they weren’t there.”

The state of play: One of the sources said they "can't think of a more fitting day to tell Kayla's story" than the day news broke of the transportation to the U.S. of two British ISIS prisoners, who comprise half of a terrorist cell known as "the Beatles."

  • They will face federal charges for allegedly torturing and beheading Western hostages.
  • A Justice Department press release said the two men "engaged in a prolonged pattern of physical and psychological violence" against American hostages, including Mueller and journalist James Foley.

Between the lines: With Kamala Harris set to indict the Trump administration over its handling of the coronavirus pandemic, Pence will try to move the conversation onto more favorable terrain.

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Why it matters: If the president can get infected, anyone can. And the scramble to figure out the scope of this outbreak is a high-profile, high-stakes microcosm of America's larger failures to contain the virus and to stand up a contact-tracing system that can respond to new cases before they have a chance to become outbreaks.

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Marc Short, Vice President Mike Pence’s chief of staff, tested positive for the coronavirus Saturday and is quarantining, according to a White House statement.

Why it matters: Short is Pence's closest aide, and was one of the most powerful forces on the White House coronavirus task force. Pence and second lady Karen Pence tested negative for the virus on Sunday morning, according to the vice president's office.

AOC: "Extremely important" that Biden offer Bernie Sanders a Cabinet position

Rep. Alexandria Ocasio-Cortez (D-N.Y.) said on CNN's "State of the Union" Sunday that she believes it's "extremely important" that Joe Biden offer Sen. Bernie Sanders and other progressive leaders Cabinet positions if he's elected president.

The big picture: Ocasio-Cortez was pressed repeatedly on policy differences between her and the more moderate Biden, including her opposition to fracking and support for Medicare for All. She responded that it would be a "privilege" and a "luxury" to be able to lobby a Biden administration on progressive issues, insisting that the focus right now should be on winning the White House.