Donald Trump Jr. effectively confirmed that he will campaign against Rep. Justin Amash, the first Republican to advocate for impeaching President Trump, in a Thursday tweet, saying that he hears "Michigan is beautiful during primary season."

Why it matters: Trump Jr. is the Trump family member with the largest following among the Republican base — and a powerful social media presence. Amash responded to Trump Jr.'s threat by tweeting: "if it's what you say I love it especially later in the summer" — a reference to the email Trump Jr. sent in 2016 after being offered dirt on Hillary Clinton by the Russian government.

Go deeper: Trump seeking candidates to primary Republican Justin Amash

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Doomsday has arrived for tens of thousands of workers

Illustration: Sarah Grillo/Axios

Federal coronavirus aid for airlines expires on Thursday with no renewal in sight, meaning massive layoffs for the industry aren't far behind.

The big picture: Airline workers aren't alone on the unemployment line. Oil companies, tire manufacturers, book publishers and insurers are among those that have announced tens of thousands of layoffs. Federal aid through the CARES Act earlier this year delayed most layoffs — until now.

2 hours ago - Science

How the brain handles the unknown

Illustration: Sarah Grillo/Axios

Uncertainty can be hard for humans. It drives anxiety, an emotion neuroscientists are trying to understand and psychologists are trying to better treat.

Why it matters: Under the threat of a virus, job insecurity, election uncertainty, and a general pandemic life-in-limbo that is upending school, holidays and more, people are especially anxious.

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Eniola Odetunde/Axios

  1. Global: Total confirmed cases as of 3 p.m. ET: 34,103,279 — Total deaths: 1,016,167 — Total recoveries: 23,694,869Map.
  2. U.S.: Total confirmed cases as of 3 p.m. ET: 7,255,546 — Total deaths: 207,374 — Total recoveries: 2,840,688 — Total tests: 103,939,667Map.
  3. Politics: House prepares to pass revised COVID relief bill as White House talks hit roadblock.
  4. Health: Health officials urge flu shots, warning of "twindemic" with COVID-19 — Coronavirus infections rise in 25 states.
  5. Business: Remdesivir is good business for Gilead.