Hunter Biden (L) and John Bolton (R). Photos: Kris Connor/WireImage; Win McNamee/Getty Images

Senate Minority Leader Chuck Schumer (D-N.Y.) told reporters Wednesday that the idea of a "witness trade" that involves calling Hunter Biden in exchange for former national security adviser John Bolton is "off the table."

Why it matters: Some Democratic senators had reportedly expressed openness to the idea of calling Hunter Biden if it meant moderate Republicans would vote in favor of subpoenaing Bolton, who is believed to have key insights into the allegations at the heart of the impeachment inquiry.

  • Rep. Adam Schiff (D-Calif.), the House's lead impeachment manager, dismissed the idea earlier on Wednesday, stressing that Hunter Biden would be "immaterial" to the impeachment charges because they involve President Trump's conduct — not his own.
  • "This isn't like some fantasy football trade," Schiff said. "Trials aren't trades for witnesses."

Joe Biden, speaking to voters on the campaign trail in Iowa, also said Wednesday he would not participate in any kind of "witness trade" for his testimony.

  • "The reason I would not make the deal, the bottom line is, this is a constitutional issue," Biden said. "We're not going to turn it into a farce or political theater. I want no part of that."

Go deeper ... Live updates: Opening arguments begin in Trump impeachment trial

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Pence to continue traveling despite aides testing positive for COVID-19

Marc Short with Pence in March. Photo: Drew Angerer/Getty Images

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.

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Mark Meadows: "We are not going to control the pandemic"

White House Chief of Staff Mark Meadows defended Vice President Pence's decision to continue traveling and campaigning despite his exposure to aides who have tested positive for COVID-19, saying Sunday that Pence is exempt from CDC guidelines because he is "essential personnel."

Why it matters: CDC guidelines call for people who have been exposed to the virus to quarantine for 14 days. Meadows said on CNN's "State of the Union" that Pence will wear a mask when he travels and argued that "he's not just campaigning," pointing to the Israel-Sudan normalization agreement announced by the White House last week.