Photo: eresa Kroeger/Getty Images for World Food Program USA

Republican Sens. Chuck Grassley (Iowa) and Ron Johnson (Wis.) announced a review on Wednesday of "potential conflicts of interest posed by the business activities of Hunter Biden and his associates during the Obama administration."

Why it matters: The announcement came roughly one hour after the Senate voted to acquit President Trump on both articles of impeachment. Trump's request for Ukraine to investigate Hunter and Joe Biden over unsubstantiated corruption claims is ultimately what sparked his impeachment.

Details: The review was announced in a letter to Secret Service Director James Murray. It states the Finance Committee and Homeland Security and Governmental Affairs Committee will look into Hunter Biden's business activities in Ukraine and China.

  • "We write to request information about whether Hunter Biden used government-sponsored travel to help conduct private business, to include his work for Rosemont Seneca and related entities in China and Ukraine," Grassley and Johnson write.
  • The senators also ask for information on "the protective detail that Hunter Biden received while his father was Vice President," and a "list of all dates and locations of travel, international and domestic, for Hunter Biden."

A spokesperson for Democratic Sen. Ron Wyden said Thursday that the Treasury Department has complied with a request from Republican senators seeking documents on Hunter Biden’s business relationship with Burisma, the Ukrainian gas company at the center of President Trump's impeachment, the New York Times reports.

  • "Applying a blatant double standard, Trump administration agencies like the Treasury Department are rapidly complying with Senate Republican requests — no subpoenas necessary — and producing ‘evidence’ of questionable origin," Wyden spokeswoman Ashley Schapitl said.
  • “The administration told House Democrats to go pound sand when their oversight authority was mandatory while voluntarily cooperating with the Senate Republicans’ sideshow at lightning speed.”

Read the letter.

Go deeper: Hunter Biden defends his Ukraine work

Go deeper

Updated 27 mins ago - World

At least 100 killed, much of Beirut destroyed in massive explosion

Photo: Anwar Amro/AFP via Getty Images

A major explosion Beirut, Lebanon has killed at least 100 people and injured over 4,000, according to the Lebanese Red Cross.

Driving the news: Prime Minister Hassan Diab said the explosions occurred at a warehouse that had been storing 2,750 tons of ammonium nitrate for over six years.

Biden confidants see VP choices narrowing to Harris and Rice

Photos: Tom Williams/CQ-Roll Call, Inc via Getty Images; Win McNamee/Getty Images

Confidants of Joe Biden believe his choices for vice president have narrowed to Sen. Kamala Harris and Susan Rice — and would be surprised if he picks anyone else.

The state of play: This is a snapshot of the nearly unanimous read that we get from more than a dozen people close to him.

An election like no other

Illustration: Eniola Odetunde/Axios

The coronavirus will make the 2020 presidential election different from any in modern history: Voting that begins earlier, results that take longer, mail carriers as virtual poll workers and October Surprises that pop in September.

The big picture: Perhaps 80 million Americans will vote early, by mail or in person, Tom Bonier, CEO of TargetSmart, a Democratic political data firm, tells Axios. That's going to set up more of an Election Season than an Election Day — and increase the odds of national turmoil over the vote count.