President Trump is calling Rep. Justin Amash a "total lightweight" who is causing controversy solely for "the sake of getting his name out there."

The big picture: Amash, the first Republican congressman to say he is in favor of impeaching Trump, was the only Republican who voted for a Democratic bill that tried to stop President Trump from declaring a national emergency to pay for the border wall.

"Never a fan of @justinamash, a total lightweight who opposes me and some of our great Republican ideas and policies just for the sake of getting his name out there through controversy. If he actually read the biased Mueller Report, “composed” by 18 Angry Dems who hated Trump,...
...he would see that it was nevertheless strong on NO COLLUSION and, ultimately, NO OBSTRUCTION...Anyway, how do you Obstruct when there is no crime and, in fact, the crimes were committed by the other side? Justin is a loser who sadly plays right into our opponents hands!"

Go deeper: Trump's new impeachment trap

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Case growth outpacing testing in coronavirus hotspots

Data: The COVID Tracking Project. Note: Vermont and Hawaii were not included because they have fewer than 20 cases per day. Chart: Andrew Witherspoon/Axios

The United States' alarming rise in coronavirus cases isn't due to increased testing — particularly not where cases have grown fastest over the last month.

Why it matters: The U.S. doesn't yet know what it looks like when a pandemic rages on relatively unchecked after the health system has become overwhelmed. It may be about to find out.

The impending retail apocalypse

Illustration: Eniola Odetunde/Axios

Because of the coronavirus and people's buying habits moving online, retail stores are closing everywhere — often for good.

Why it matters: Malls are going belly up. Familiar names like J.C. Penney, Neiman Marcus and J. Crew have filed for bankruptcy. Increasingly, Americans' shopping choices will boil down to a handful of internet Everything Stores and survival-of-the-fittest national chains.

Biden campaign using Instagram to mobilize celebrity supporters

Collins appears on the Build live interview series in November 2019. Photo: Gary Gershoff/Getty Images

The Biden campaign is launching a new initiative today that will draft Hollywood celebrities for Instagram Live chats with campaign officials and other Biden supporters.

Why it matters: The campaign, called #TeamJoeTalks, is an attempt to open up a new front on social media, drawing on celebrities’ Instagram followers to help find and motivate voters while large parts of the country remain locked down.