President Trump refused to say on "Fox News Sunday" whether he would accept the results of November's election if he loses to Joe Biden, telling host Chris Wallace: "I have to see. I'm not just going to say yes. I'm not going to say no."

Why it matters: Trump gave a similar answer in 2016 when he was running against Hillary Clinton, prompting concerns there might not be a peaceful transition to power. At that time, however, Trump was not the incumbent.

  • Trump said his willingness to concede will depend on mail-in voting, which he said he thinks is going to "rig the election" — a claim he has previously made without factual evidence.

What he's saying: "I'm not a good loser. I don't like to lose. I don't lose too often. ... Look, Hillary Clinton asked me the same thing. ... You know what, she's the one who never accepted the loss."

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Biden launches $280 million ad push

Photo: Mark Makela/Getty Images

Joe Biden's campaign is launching a $280 million TV and digital ad campaign heading into the fall, targeting 15 states with a message — delivered directly from Biden — about the coronavirus pandemic and the economy.

Why it matters: The size of the buy, which advisers described on a call with reporters Tuesday night, signals a campaign that isn't worried about burning through cash — and it may force the Trump campaign, or associated super PACs, to increase their spending in response.

Elliott Abrams to replace Brian Hook as Trump's Iran envoy

Brian Hook. Photo: Tayfun Coskun/Anadolu Agency via Getty Image

President Trump's Iran envoy, Brian Hook, is stepping down, Secretary of State Mike Pompeo confirmed Thursday. He will be replaced with Venezuela envoy Elliott Abrams, a noted Iran hawk who will serve in both roles.

Why it matters: Hook had been tasked with executing Trump's "maximum pressure" policy toward Iran, working closely with Pompeo. That strategy has deepened tensions and thus far failed to force Iran back to the negotiating table, as Trump had hoped.

Ohio Gov. Mike DeWine tests positive for coronavirus ahead of Trump visit

Photo: Justin Merriman/Getty Images

Ohio Gov. Mike DeWine (R) has tested positive for COVID-19 and plans to quarantine at his home for the next 14 days, his office announced Thursday. He currently has no symptoms.

Why it matters: The 73-year-old DeWine was set to meet President Trump Thursday on the tarmac at an airport in Cleveland and was tested as part of standard protocol. He is the second governor known to have contracted the coronavirus, after Oklahoma Gov. Kevin Stitt (R).