Photo: Win McNamee/Getty Images

President Trump's outdoor campaign rally in Portsmouth, N.H., slated to take place on Saturday, was postponed on Friday due to weather from Tropical Storm Fay, a senior White House official confirmed to Axios.

The state of play: Press Secretary Kayleigh McEnany told reporters on Air Force One that the event would take place in "a week or two" instead. The outdoor rally — which had encouraged the use of face masks — was scheduled after sparse attendance at Trump's indoor comeback to the campaign trail in Tulsa.

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Updated Aug 5, 2020 - Science

Isaias becomes post-tropical cyclone after deadly day on East Coast

A downed tree in a Brooklyn neighborhood on Aug. 4 in New York City. Photo: Spencer Platt/Getty Images

Isaias became a post-tropical cyclone as it moved into southeast Canada late Tuesday, after spending much of the day lashing the East Coast with heavy rain and spawning tornadoes, per a National Hurricane Center (NHC) update at 11 p.m.

The latest: The NHC warned tropical storm conditions were expected "for a few more hours" along portions of the New England coast. The storm that's killed at least six people and left over 3 million customers without power in New York, New Jersey, Pennsylvania, North Carolina, Delaware, Virginia and Maryland, per Poweroutage.us.

Pelosi, Schumer demand postmaster general reverse USPS cuts ahead of election

Schumer and Pelosi. Photo: Alex Wong/Getty Images

House Speaker Nancy Pelosi (D-Calif.) and Senate Minority Leader Chuck Schumer sent a letter to Postmaster General Louis DeJoy on Thursday calling for the recent Trump appointee to reverse operational changes to the U.S. Postal Service that "threaten the timely delivery of mail" ahead of the 2020 election.

Why it matters: U.S. mail and election infrastructure are facing a test like no other this November, with a record-breaking number of mail-in ballots expected as Americans attempt to vote in the midst of a pandemic.

CRISPR co-discoverer on the gene editor's pandemic push

Photo illustration: Aïda Amer/Axios. Photos: Brian Ach/Getty Images for Wired and BSIP/UIG via Getty Images

The coronavirus pandemic is accelerating the development of CRISPR-based tests for detecting disease — and highlighting how gene-editing tools might one day fight pandemics, one of its discoverers, Jennifer Doudna, tells Axios.

Why it matters: Testing shortages and backlogs underscore a need for improved mass testing for COVID-19. Diagnostic tests based on CRISPR — which Doudna and colleagues identified in 2012, ushering in the "CRISPR revolution" in genome editing — are being developed for dengue, Zika and other diseases, but a global pandemic is a proving ground for these tools that hold promise for speed and lower costs.