NPR Staff

Updated at 10:30 p.m. ET

Sen. Richard Burr, R-N.C., is stepping aside temporarily as chairman of the Intelligence Committee amid a Justice Department investigation of his stock trades, Senate Majority Leader Mitch McConnell announced Thursday.

The White House released guidance on coronavirus testing on Monday, which reiterates the administration's work on testing and includes recommendations for states to further develop and implement their own testing plans.

President Trump said in a letter to U.S. governors on Thursday that his administration is working to publish new guidelines for state and local governments to use when making decisions about "maintaining, increasing or relaxing social distancing and other mitigation measures" for the coronavirus epidemic.

Trump said officials are gathering testing data that will suggest guidelines categorizing counties as "high risk, medium risk or low risk" for the virus. The data will drive "the next phase" of the response, he said.

The challenges that COVID-19 poses for governments around the world are formidable. For Taiwan, there have been additional hurdles.

Experts say the island's response to the novel coronavirus has been remarkably effective so far, despite many serious challenges, starting with its close links to China, and may even hold lessons for others to follow.

Updated at 3:55 p.m. ET

Attorney General William Barr is scheduled to testify before the House Judiciary Committee after the Justice Department took the unusual step of intervening in Roger Stone's sentencing recommendation.

President Trump hailed Barr on Wednesday for making the recommendation.

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