E-newsletters I read...
Morning Cybersecurity
https://www.politico.com/newsletters/morning-cybersecurity
Codebook
https://www.axios.com/newsletters/axios-codebook
OUCH! Newsletter
https://www.sans.org/security-awareness-training/ouch-newsletter
A few of the Twitter-ers I follow...
Jennifer Chon - "Citizen Cohn" is obsessed with the security of US elections. But in a healthy way. Mostly.
https://twitter.com/jennycohn1
Boing Boing - "Boing Boing" is to news what HomeGoods is to... stuff. They include a surprising amount of infosec tidbits in their eclectic news mix.
https://twitter.com/BoingBoing
Cybersecurity and Infrastructure Security Agency (CISA) - A division of the US Department of Homeland Security. I feel obligated to follow them even though they seem fairly useless. In terms of government cybersecurity, all the cool kids seem to be at NIST.
https://twitter.com/CISAgov