The only official information the public has about the FBI's new involvement with the case of Hillary Clinton's private email server is the letter FBI Director James Comey sent to Congress on Friday, saying the FBI had discovered "emails that appear to be pertinent" and would take "appropriate investigative steps designed to allow investigators to review these emails to determine whether they contain classified information." There has also been a lot of speculation, finger-wagging, and briefings to the media from unidentified — and apparently feuding — factions in the FBI and Justice Department.

The two big questions are whether the emails — reportedly found on a laptop owned by Clinton aide Huma Abedin's estranged husband, Anthony Weiner — will reveal classified information or anything that suggests Clinton tried to impede the FBI investigation, and how it will affect the 2016 election. An ABC News-Washington Post tracking poll conducted after Comey's bombshell suggests it might hurt Clinton, with Donald Trump narrowing his deficits to just 1 point in a four-person race, from 2 points previously; almost all of the gain comes from Republicans and GOP-leaning independents coming home to Trump. But the pollsters also asked about the FBI's review of Clinton's emails:

A sizable majority, 63 percent, said this would make no difference to how they voted, but 34 percent said it would make them less likely to vote for Clinton. Most of those people, 68 percent, are Republican and GOP-leaning independents, but 17 percent are Democrats or Democratic-leaners, and another 9 percent say they don't lean toward either party. That's not good news for Clinton. More than 20 million people have already voted, and it's not clear if other polls will mirror this response — weekend polls tend to be less reliable, and the ABC News-Washington Post poll shows a tighter race than other national polls. Plus, the history of "October surprises" is mixed, electorally.

But even if Clinton can maintain her lead, "the email news could matter most in down-ballot races," The New York Times notes. "After being on the defensive for weeks because of Mr. Trump's behavior, Republican candidates now have a more helpful news media environment in which to make their closing arguments. And Republican voters who are otherwise demoralized may have been given one final nudge to show up to the polls." Peter Weber

"There is simply no democratic justification whatsoever for [U.K. Prime Minister] Boris Johnson or anyone else seeking to block the right of the people of Scotland to choose our future," Scottish National Party leader and Scotland's First Minister Nicola Sturgeon said Saturday in a victory speech after the SNP won its fourth straight election, while the pro-independence Greens also had a strong showing, meaning a majority of Scottish parliament would back a referendum.

If a vote is blocked Sturgeon added, it "will demonstrate conclusively that the U.K. is not a partnership of equals and astonishingly that Westminster no longer sees it as a voluntary union of nations."

While Sturgeon is expected to pressure Johnson to allow another referendum, the prime minister has said he won't, calling it "irresponsible and reckless."

As for what's happening on the ground with Scottish voters, Prof. John Curtice, whom Bloomberg notes is the U.K.'s "most prominent electoral analyst," said the country is "divided straight down the middle on the constitutional question," which was the driving force behind the highest turnout since 1999. There's no telling which way a vote would go at the moment, so a referendum would be an "enormous political gamble" for both Johnson and Sturgeon, Curtice writes. Read more at BBC and Bloomberg. Tim O'Donnell

Annie Pforzheimer, a longtime diplomat who has extensive experience working in Afghanistan, is concerned about President Biden's plan to withdraw U.S. troops from the country without any conditions from the Taliban by or before Sept. 11, 2021. In a piece for Politico published Saturday, she shares her not uncommon view that the U.S. exit will allow the Taliban an opportunity to "increase their territorial control and dictatorial rule," depriving Afghanistan of much hope for a "normal future." But, at this point, she acknowledges Biden's mind won't change, so she turned her attention to ways the U.S. can employ leverage without forces on the ground.

Pforzheimer's ideas include remaining publicly committed to Afghan security forces, retaining old and imposing new sanctions on the Taliban until they're no longer a threat to Afghanistan's stability, and refusing to recognize a Taliban government if it "denies basic human rights to its citizens." She also argues the U.S. should make sure that "Afghanistan's neighbors, particularly Pakistan and Central Asia ... prioritize their existing trade and energy linkages and press for a peace process that will contribute to regional prosperity." Additionally, she writes, "the Gulf States and other former and current Taliban patrons should understand that a peaceful outcome is a top U.S. government goal." Read Pforzheimer's full piece at Politico. Tim O'Donnell

The Colonial Pipeline, the principal transporter of gasoline and diesel fuel up and down the East Coast of the United States, was temporarily shut down on Friday after its operator, Colonial Pipeline Co., learned it was the victim of a cyberattack.

The attack reportedly involved ransomware and appeared to be limited to information systems, as opposed to operational control systems, but the investigation is still in the early stages. Subsequently, there's no clear sense of who the perpetrator was.

Analysts don't expect the stoppage to negatively affect fuel markets or cause any shortages, so long as it only lasts for a day or two, The Wall Street Journal reports. Still, Tom Kloza, the global head of energy analysis for Oil Price Information Services, told the Journal that targeting the pipeline, which carries roughly 45 percent of the fuel consumed in the United States, is a "big deal" and "could really wreak havoc."

Mike Chapple, a cybersecurity expert at the University of Notre Dame and a former National Security Agency official, added that the pipeline shutdown "sends the message that core elements of our infrastructure continue to be vulnerable to cyberattack," a threat Homeland Security Secretary Alejandro Mayorakas acknowledged as recently as Wednesday, the Journal notes. Read more at The Wall Street Journal and Bloomberg. Tim O'Donnell

The National Republican Congressional Committee did not share internal polling data that showed former President Donald Trump has weak numbers in key battleground districts at a retreat for House Republicans in April, two people familiar with the presentation told The Washington Post. The NRCC staffers reportedly held back the information even when a member of Congress asked them directly about Trump's support.

The Post later obtained the full polling results, reporting that Trump's unfavorable ratings were 15 points higher than his favorable ones, and nearly twice as many voters had a strongly unfavorable view of him than those who had a strongly favorable one. In those same districts, President Biden and Vice President Kamala Harris were both more popular than Trump, the Post notes.

It reportedly wasn't the first time this has happened — Rep. Liz Cheney (R-Wyo.) told colleagues that Republican campaign officials had also glossed over poor Trump polling during a retreat for ranking committee chairs in March, per the Post.

Cheney, you may have heard in recent weeks, is determined to move the GOP away from Trump and she'd likely point to the polling as a reason why, but she's faced a lot of criticism from her colleagues, including House Minority Leader Kevin McCarthy (R-Calif.), who think the party's short-term electoral chances are doomed without the former president leading the charge, and there's no indication their minds will change anytime soon. Read more about Cheney's efforts at The Washington Post. Tim O'Donnell

The Centers for Disease Control and Prevention on Friday updated its public COVID-19 guidance to explicitly state that the coronavirus can be transmitted via aerosols — smaller respiratory particles that can float — that are inhaled at a distance greater than six feet from an infected person. The risk is higher while indoors, bringing ventilation practices to the forefront. The new language marks a change from the federal health agency's previous stance that transmission of the virus typically occurs through "close contact, not airborne transmission."

Infectious disease experts have warned that the CDC and the World Health Organization (which has also updated its guidance) were overlooking evidence of airborne transmission during the pandemic, The New York Times notes, and some have stressed the need for the CDC to strengthen its recommendations for preventing exposure to aerosolized virus, especially in indoor workplaces like meatpacking plants.

Good ventilation should be one of the primary things to focus on, Dr. David Michaels, an epidemiologist at George Washington School of Public Health and the head of the Occupation and Safety Health Administration during the Obama administration, told the Times. Dr. Linsey Marr, an aerosol expert at Virginia Tech, explained that "if you're in a poorly ventilated environment, virus is going to build up in the air, and everyone who's in that room is going to be exposed."

Sociologist Zeynep Tufekci, who has long been pushing for such a change, called it "one of the most crucial scientific advancements of the pandemic" that should provide a lot of clarity about what is and isn't safe going forward. Read her Twitter thread on the issue here and learn more at The New York Times. Tim O'Donnell

India recorded 4,187 new COVID-19 deaths in the last 24 hours, the government said Saturday, marking the first time the country, which is in the midst of a record-breaking surge of infections, has tallied 4,000 fatalities in a day. India's death toll, which has been questioned by health experts, officially sits at 238,270, the third highest in the world after the United States and Brazil.

India also added 401,078 cases on Saturday, a slight drop from the previous day, but the country's peak is not expected until the end of May. While cases appear to be stabilizing in large cities like Mumbai and New Delhi, the coronavirus is spreading in rural areas and southern states, several of which have ordered lockdowns. Oxygen and critical care bed shortages remain a major concern. Read more at Al Jazeera and Agence France-Presse. Tim O'Donnell